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  1. Title: Automated Weather Observation System Locations, California, 2016

    Contributors:

    Summary: This point shapefile contains the locations of Automated Weather Observation Systems (AWOS), created from the California Aviation System Plan (2013) list. The upgrades and distribution of AWOS, Automated Surface Observation Systems (ASOS), and Automated Terminal Information Services (ATIS) in California are a critical part of the State aviation system. Access to localized weather conditions benefit both commercial and General Aviation (GA) operations. Caltrans Division of Aeronautics (Division) is monitoring the expansion and updating of the system with a focus on bringing more of this technology to key airports thereby improving air safety. Also, as AWOS/ASOS technology improves, the use of the hardware for shared uses, such as monitoring remote highways concurrently with remote airports is seen as an essential safety measure for normal as well as emergency response operations. The State is currently researching a cooperative approach to improving the road and aviation automated weather reporting system to support multimodal safety statewide. The expansion of the system through Public Private Partnerships (P3) is also becoming a topic of increasing interest as data and cost sharing strategies among various users becomes more desired, available and practical. AWOS is a computer-generated voice which is used to automate the broadcast of the minute-by-minute weather observations. ASOS is the primary surface weather observing system of the United States. ATIS is the continuous broadcast of recorded non-control information which converts selected meteorological data and air traffic control data into human speech. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2016). Automated Weather Observation System Locations, California, 2016. California Department of Transportation. Available at http://purl.stanford.edu/gd204rv6067. Data Sources and references: • California Aviation System Plan, 2013 Inventory Element (CASP/IE), by California Department of Transportation Division of Aeronautics, CASP/IE Section 2 http://www.dot.ca.gov/hq/planning/aeronaut/documents/casp/casp_inventory_element_sections_2and3_with_appendices.pdf • California Aviation System Plan (CASP) Elements: http://www.dot.ca.gov/hq/planning/aeronaut/documents/casp/ This data is provided as a service for planning purposes and not intended for design, navigation purposes or airspace consideration. Such needs should include discussions with the Federal Aviation Administration, Caltrans Division of Aeronautics, and the site management/owners. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  2. Title: Park and Ride Lots, California, 2016

    Contributors:

    Summary: This point shapefile contains the locations of commuter park and ride lots in the California state highway system as of 2016. The park and ride lots provide a location for individuals to park their vehicles to join carpools and to access bus and rail services, thereby taking vehicles off local streets and roads and the State Highway System. This layer is derived from a “Park & Ride Inventory” excel spreadsheet maintained by California Department of Transportation (Caltrans), Division of Traffic Operations, Office of System Management Operations. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2016). Park and Ride Lots, California, 2016. California Department of Transportation. Available at http://purl.stanford.edu/tz099sh4447. Reference link: http://www.dot.ca.gov/hq/traffops/trafmgmt/hov/Park_and_Ride/index.html The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  3. Title: Bridges, California State Highway System, 2015

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    Summary: This point shapefile contains the locations of bridges on the California State Highway System as of April 2015. The dataset consists of bridge attributes collected for the purpose of reporting to Federal Highway Administration. The data was extracted from the California Structure Maintenance and Investigations (SMI) database. SMI performs bridge inspections in accordance with federal regulations on over 12,000 State Highway bridges and approxiamtely 12,200 bridges owned by local agencies. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Bridges, California State Highway System, 2015. California Department of Transportation. Available at http://purl.stanford.edu/td948by1459. Note: The dataset consists of bridge attributes collected for the purpose of reporting to Federal Highway Administration. This data was obtained on the date indicated by the file. The data was extracted from the SM&I database and may have been in the process of being modified when it was extracted. For official data attributes for each bridge, use the signed and stamped Bridge Inspection Reports stored in BIRIS (http://db2.dot.ca.gov:7777/forms/frmservlet?config=biris). Reference: Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges (FHWA-PD-96-0001) Public data but have some limitations, such as for planning purpose only. Disclaimer: The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Office of Data Services and Technology, GIS Branch makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  4. Title: Caltrans Regions, 2015

    Contributors:

    Summary: This polygon shapefile represents California Department of Transportation (Caltrans) regions in California as of 2015. Caltrans has 12 districts and 2 regions as high-level management areas. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Caltrans Regions, 2015. California Department of Transportation. Available at http://purl.stanford.edu/zv155kt6545. The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  5. Title: Truck Traffic Volume, California, 2014

    Contributors:

    Summary: This point shapefile contains annual average daily truck traffic volume (also known as traffic counts) on California's state highway network for 2014. Annual average daily truck traffic is the total truck traffic volume divided by 365 days. Truck counting is done throughout the state in a program of continuous truck count sampling. The sampling includes a partial day, 24-hour, 7-day and continuous vehicle classification counts. The partial day and 24-hour counts are usually made on high volume, urban highways. The 7-day counts are made on low volume, rural highways. The counts are usually taken only once in the year. About one-sixth of the locations are counted annually. The resulting counts are adjusted to an estimate of annual average daily truck traffic by compensating for seasonal influence, weekly variation, and other variables that may be present. Annual average daily truck traffic is necessary for presenting a statewide picture of truck flow, evaluating truck trends, planning and designing highways and for other purposes. Truck traffic is classified by number of axles. The two-axle class includes 11/2-ton trucks with dual rear tires and excludes pickups and vans with only four tires. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Truck Traffic Volume, California, 2014. California Department of Transportation. Available at http://purl.stanford.edu/ds218yv2329. This is Category I data. Category I data are public domain and available to share with Caltrans partners. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  6. Title: Hospital Heliports, California, 2015

    Contributors:

    Summary: This point shapefile contains the locations of hospital heliports in California as of 2015. Each location is supplied along with the links to the heliport info sheets that provide permitted approach paths and other information for all the permitted Hospital Heliports in California. The information will be helpful to emergency planners, helicopter operators, and other users. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Hospital Heliports, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/dj057mw1855. Original data is based on hospital heliport permit safety inspections but coordinates have been modified using Google Earth/Maps aerial imagery background for Caltrans Earth applications. Additional information and heliport interactive map site can be found at the Caltrans Division of Aeronautics home page: http://www.dot.ca.gov/hq/planning/aeronaut/index.html http://www.dot.ca.gov/hq/planning/aeronaut/dataplates.html More information can be found at Caltrans division of Aeronautics website at http://www.dot.ca.gov/hq/planning/aeronaut/index.htm,or visit Hospital Heliport Dataplates website at http://www.dot.ca.gov/hq/planning/aeronaut/helipads/dataplates/ This data is provided as a service for planning purposes and not intended for design, navigation purposes or airspace consideration. Such needs should include discussions with the Federal Aviation Administration, Caltrans Division of Aeronautics, and the site management/owners.

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  7. Title: Safety Roadside Rest Areas, California, 2015

    Contributors:

    Summary: This point shapefile contains the locations of safety roadside rest areas in California as of July 2015. The California Department of Transportation (Caltrans) provides safety roadside rest areas as a part of the State Highway System pursuant to Streets and Highways Code, Sections 218-226.5. Safety roadside rest areas provide opportunities for travelers to safely stop, stretch, take a nap, use the restroom, get water, check maps, place telephone calls, switch drivers, check vehicles and loads, and exercise pets. Rest areas reduce drowsy and distracted driving and provide a safe and convenient alternative to unsafe parking along the roadside. This layer provides detailed rest area information by integrating the information from the Asset Management Inventory (AMI) database owned by Right of Way with the Statewide Rest Areas List from Division of Maintenance. In some cases rest areas are closed temporarily for maintenance, the facility web links will help to check the current status of the rest areas. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Safety Roadside Rest Areas, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/tc473kk8140. Safety Roadside Rest Area Coordinators: http://www.dot.ca.gov/hq/LandArch/srra/srra-contacts.htm Data Sources: • The Asset Management Database (Caltrans, Division of Right of Way and Land Surveys) • Statewide Roadside Rest Areas List: http://www.dot.ca.gov/hq/maint/ra/Statewide.htm • Safety Roadside Rest Area System: http://www.dot.ca.gov/hq/LandArch/srra/index.htm The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  8. Title: State Highways (Segments), California, 2015

    Contributors:

    Summary: This line shapefile represents highway segments in California. Each object in this layer represents a highway segment where the county, route, postmile prefix, and postmile suffix are the same. Each segment is coded with the district, county, route, postmile prefix (if any), begin postmile, end postmile, and postmile suffix (if any). One additional field - AlignCode - indicates if the state highway segment is on a Right alignment, Left alignment, Right side of an independent alignment, or Left side of an independent alignment. Where TSN (Transportation System Network - the source database) considers most state highways to have just a centerline, the underlying LRS (Linear Referencing System) linework that these segments are based upon has a line for each direction. In some cases the right and left lines are identical (where there is no median). In other cases the right and left are separated (where there is a median, or dual carriageways), but TSN treats the segment as a single centerline. In the last case the underlying linework has dual carriageways, and TSN treats the segment as a split alignment (where there are independent right and left alignments). In some cases (especially for small-scale mapping), it may be appropriate to display linework for just one alignment (e.g. Right alignment), and only for the other side where TSN indicates independent right and left alignments. In other cases (e.g. large-scale mapping), it may be appropriate to display postmiles for both alignments, regardless of how TSN treats the segment. This is an example of a query string that displays linework only for the right alignment where TSN indicates just a centerline, and on both right and left alignments where TSN indicates independent alignments: "AlignCode" <> 'Left'. The bOdometer and eOdometer fields represent the actual distance in miles from the start of the highway to the begin and end of each highway section. This is in contrast to the begin and end postmile values, which no longer represent these values as each highway is realigned (and made longer or shorter) over time. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). State Highways (Segments), California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/xc453kn9742. The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  9. Title: Vista Points, California, 2015

    Contributors:

    Summary: This point shapefile contains the locations of vista points along the California State Highway System as of 2015. Vista points are informal pullouts where motorists can safely view scenery or park and relax. They do not include rest rooms. Vista points may have facilities including walkways, interpretive displays, railings, benches, interpretive information, trash receptacles, monuments and other pedestrian facilities that are accessible to all persons. California Department of Transportation (Caltrans) Division of Maintenance created this layer by retrieving vista information from the Asset Management Inventory (AMI) database owned by Right of Way. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Vista Points, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/tr330qq8079. Data Sources and references: • The Asset Management Database (Caltrans, Division of Right of Way and Land Surveys) • The website of California Vista Point Planning and Design http://www.dot.ca.gov/hq/LandArch/index_more.htm The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  10. Title: Traffic Volume, California, 2014

    Contributors:

    Summary: This point shapefile contains traffic volume (also known as traffic counts) on California's state highway network created from 2014 Average Annual Daily Traffic (AADT) counts (excel spreadsheet) maintained by Caltrans, Division of Traffic Operations. Annual average daily traffic is the total volume for the year divided by 365 days. The traffic count year is from October 1st through September 30th. Very few locations in California are actually counted continuously. Traffic counting is generally performed by electronic counting instruments moved from location throughout the State in a program of continuous traffic count sampling. The resulting counts are adjusted to an estimate of annual average daily traffic by compensating for seasonal influence, weekly variation and other variables which may be present. Annual ADT is necessary for presenting a statewide picture of traffic flow, evaluating traffic trends, computing accident rates, planning and designing highways and other purposes.This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Traffic Volume, California, 2014. California Department of Transportation. Available at http://purl.stanford.edu/fx041qj6799. Traffic Census Program: http://www.dot.ca.gov/hq/traffops/saferesr/trafdata/index.htm Disclaimer: The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  11. Title: Cities, California, 2015

    Contributors:

    Summary: This polygon shapefile contains the boundaries of cities in California as of 2015. This layer is an updated version of the 2012 layer. These data were created by extracting city boundaries from the Tax Area Services Section (TASS) of the California Board of Equalization 2013-2015 data release. The city boundary lines were digitized to match available county parcel base information provided from TASS in the format of CAD DWG layers and/or the Tax Rate Area (TRA) maps in PDF file. TIGER/Line Parcel data and ESRI Basemap imagery were used as reference layers. Additional 3 nautical mile offshore polygons were digitized for the coastal cities located from south of San Francisco to the Mexican border according to TRA maps. We keep the offshore polygons separate from their city boundaries on the lands, and put “3 nautical mile offshore” label in the attribute “Notes” for those polygons. The attributes include 2010 United States Census population and land area information, the city incorporated dates and web links are listed as well. This GIS version of California City boundaries is intended for general reference, planning, and study purposes only and does not represent official property boundary determinations. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Cities, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/zd071bk4213. Additional references: 1. The League of California Cities (http://www.cacities.org/Resources/Learn-About-Cities ) 2. California Cities by Incorporation Date (http://calafco.org/resources.htm#incorp ). The California Association of Local Agency Formation Commissions (CALAFCO). Notes from California State Board of Equalization (SBE): These TRA datasets are “only suitable for assessment purposes” and should not be used for any other purpose. TASS information may be freely distributed as long as the use of the information does not violate the Public Records Act, California Government Code §6250 and Information Practices Act of 1977, California Civil Code Section §1798-1798.1 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  12. Title: Local Agency Owned Bridges, California, 2015

    Contributors:

    Summary: This point shapefile contains the locations of local government agency owned bridges in the California state highway system as of April 2015. Bridge inventory data was obtained from the California Department of Transportation (Caltrans) Structure Maintenance and Investigations (SMI) Database. SMI performs bridge inspections in accordance with federal regulations on over 12,000 State Highway bridges and approximately 12,200 bridges owned by local government agencies. Caltrans bridge inspectors are responsible for maintaining the safety and integrity of over 24000 bridges owned by the State of California and California's local government agencies. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Local Agency Owned Bridges, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/cx668kz9577. Note: The dataset consists of bridge attributes collected for the purpose of reporting to Federal Highway Administration. This data was obtained on the date indicated by the file. The data was extracted from the SM&I database and may have been in the process of being modified when it was extracted. For official data attributes for each bridge, use the signed and stamped Bridge Inspection Reports stored in BIRIS (http://db2.dot.ca.gov:7777/forms/frmservlet?config=biris). Reference: Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges (FHWA-PD-96-0001) For more information, please see Caltrans Division of Maintenance, Structure Maintenance website at http://www.dot.ca.gov/hq/structur/strmaint/ Public data but have some limitations, such as for planning purpose only. Disclaimer: The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Office of Data Services and Technology, GIS Branch makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  13. Title: High Occupancy Vehicle Lanes, California, 2015

    Contributors:

    Summary: This line shapefile represents the existing, under construction, programmed, and proposed High-Occupancy Vehicle (HOV) lanes on the California state Highway system as of 2015. Also known as carpool or diamond lanes, HOV lanes are a traffic management strategy to promote and encourage ridesharing; thereby alleviating congestion and maximizing the people-carrying capacity of California highways. HOV lanes are usually located on the inside (left) lane and are identified by signs along the freeway and white diamond symbols painted on the pavement. In Northern California, HOV lanes are only operational on Monday thru Friday during posted peak congestion hours, for example: between 6 a.m. - 10 a.m. and 3 p.m. - 7 p.m. All other vehicles may use the lanes during off-peak hours. This is referred to as "part-time" operation. In Southern California, HOV lanes are generally separated from other lanes by a buffer zone. The HOV lanes are in effect 24-hours a day, 7-days a week, referred to as "full-time" operation.The locations of the HOV system are based on postmiles derived from an excel spreadsheet maintained by Caltrans, Division of Traffic Operations, Office of System Management Operations. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). High Occupancy Vehicle Lanes, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/rc513df2557. The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Office of Data Services and Technology, GIS Branch makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  14. Title: Caltrans Districts, 2015

    Contributors:

    Summary: This polygon shapefile represents California Department of Transportation (Caltrans) districts in California as of 2015. Caltrans has 12 districts and 2 regions as high-level management areas. As of Nov. 1, 2015, District 9 has become an independent district separate from the Central region. These boundaries are primarily based on the county boundaries. Census TIGER/Line county data from 2010 were used to create this layer. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Caltrans Districts, 2015. California Department of Transportation. Available at http://purl.stanford.edu/jm453xc4077. The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  15. Title: Commercial Vehicle Enforcement Facilities, California, 2015

    Contributors:

    Summary: This point shapefile contains the locations of commercial vehicle enforcement facilities (CVEF), also called weight stations, in California as of 2015. Highway pavement depends upon the weight and frequency of the traffic using the facility. Heavy trucks cause far greater impact on pavement and bridges compared to passenger cars. It is important to monitor overweight truck traffic in order to preserve and extend pavement life. The California Department of Transportation (Caltrans) Division of Maintenance created this GIS layer by retrieving the CVEF information from the Asset Management Inventory (AMI) database owned by Right of Way. The data attributes include the location description and weight station classification. Based upon the weight station primary function, staffing needs, size, location, and physical configuration, five classification have been established: A, B, C, D, mini-sites. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2015). Commercial Vehicle Enforcement Facilities, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/yx674gw3304. The inspection program enhances commercial vehicle and driver safety. For detail information on truck access and weight limitation, please visit Caltrans, Division of Traffic Operations website: http://www.dot.ca.gov/hq/traffops/trucks/trucksize/weight.htm Data Sources and references: • The Asset Management Database (Caltrans, Division of Right of Way and Land Surveys) • 2011 Commercial Vehicle enforcement Facility Inventory of Needs Report, http://www.dot.ca.gov/hq/traffops/trucks/weigh-stations/needs-inventory.pdf The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein.

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  16. Title: Truck Traffic Volume, California, 2010

    Contributors:

    Summary: This point shapefile contains annual average daily truck traffic volume (also known as traffic counts) on California's state highway network for 2010. Annual average daily truck traffic is the total truck traffic volume divided by 365 days. Truck counting is done throughout the state in a program of continuous truck count sampling. The sampling includes a partial day, 24-hour, 7-day and continuous vehicle classification counts. The partial day and 24-hour counts are usually made on high volume, urban highways. The 7-day counts are made on low volume, rural highways. The counts are usually taken only once in the year. About one-sixth of the locations are counted annually. The resulting counts are adjusted to an estimate of annual average daily truck traffic by compensating for seasonal influence, weekly variation, and other variables that may be present. Annual average daily truck traffic is necessary for presenting a statewide picture of truck flow, evaluating truck trends, planning and designing highways and for other purposes. Truck traffic is classified by number of axles. The two-axle class includes 11/2-ton trucks with dual rear tires and excludes pickups and vans with only four tires. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2014). Truck Traffic Volume, California, 2010. California Department of Transportation. Available at http://purl.stanford.edu/cz102xx0313. Total vehicle AADT for the same year is taken from the Traffic Volumes on California State Highways booklet also published by the California Department of Transportation.Reference Link: http://www.dot.ca.gov/hq/traffops/saferesr/trafdata/index.htm This is Category I data. Category I data are public domain and available to share with Caltrans partners. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  17. Title: Traffic Volume, California, 2012

    Contributors:

    Summary: This point shapefile contains traffic volume (also known as traffic counts) on California's state highway network created from 2012 Average Annual Daily Traffic (AADT) counts (excel spreadsheet) maintained by Caltrans, Division of Traffic Operations. Annual average daily traffic is the total volume for the year divided by 365 days. The traffic count year is from October 1st through September 30th. Very few locations in California are actually counted continuously. Traffic counting is generally performed by electronic counting instruments moved from location throughout the State in a program of continuous traffic count sampling. The resulting counts are adjusted to an estimate of annual average daily traffic by compensating for seasonal influence, weekly variation and other variables which may be present. Annual ADT is necessary for presenting a statewide picture of traffic flow, evaluating traffic trends, computing accident rates, planning and designing highways and other purposes. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2014). Traffic Volume, California, 2012. California Department of Transportation. Available at http://purl.stanford.edu/hs718xp1605. The data list 2012 taffic volumes for all count locations on the California state highway system. Peak hours, peak month ADTs and annual ADTs are shown at each count location. Significant volume changes (breakpoints) in the traffic profile along each route are counted and identified by name and milepost value. In addition to the profile breakpoints, these files list county lines and well-known landmarks to aid in orientation. All traffic volume figures listed include traffic in both directions unless otherwise indicated. Reference link: http://www.dot.ca.gov/hq/traffops/saferesr/trafdata/index.htm This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  18. Title: Truck Traffic Volume, California, 2013

    Contributors:

    Summary: This point shapefile contains annual average daily truck traffic volume (also known as traffic counts) on California's state highway network for 2013. Annual average daily truck traffic is the total truck traffic volume divided by 365 days. Truck counting is done throughout the state in a program of continuous truck count sampling. The sampling includes a partial day, 24-hour, 7-day and continuous vehicle classification counts. The partial day and 24-hour counts are usually made on high volume, urban highways. The 7-day counts are made on low volume, rural highways. The counts are usually taken only once in the year. About one-sixth of the locations are counted annually. The resulting counts are adjusted to an estimate of annual average daily truck traffic by compensating for seasonal influence, weekly variation, and other variables that may be present. Annual average daily truck traffic is necessary for presenting a statewide picture of truck flow, evaluating truck trends, planning and designing highways and for other purposes. Truck traffic is classified by number of axles. The two-axle class includes 11/2-ton trucks with dual rear tires and excludes pickups and vans with only four tires. ). This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2014). Truck Traffic Volume, California, 2013. California Department of Transportation. Available at http://purl.stanford.edu/jq569jn6481. This is Category I data. Category I data are public domain and available to share with Caltrans partners. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  19. Title: Express Lanes, California, 2015

    Contributors:

    Summary: This line shapefile represents express lanes, also known as High Occupancy Toll (HOT) lanes, in the California State Highway System for 2015. HOT lanes are High Occupancy Vehicle (HOV) lanes that may be accessed by single occupant vehicles by paying a toll. This layer also shows existing, and programmed-proposed express lanes located on the state highway system. The California HOV/Express Lane Business Plan is a framework for Caltrans and its partners to focus statewide activity during 2009-2011 that will lead the state to easily implement more flexible and effective system management strategies for HOV and HOT lanes. The ultimate vision is a transportation system offering new commute choices and more reliable travel through congested corridors; where congestion is managed and the availability of an express service option is greatly improved, and where governments at all levels work together to manage demand with effective monitoring and adjustment of operations and design. In this Business Plan, Caltrans, regional transportation agencies, FHWA and the CHP, have developed a coordinated framework to guide the current and future development and operation of HOV and Express Lane throughout the state, capitalizing on strong partnerships and operating strategies already in place.The locations of the HOV/Express lanes are based on postmiles derived from an excel spreadsheet maintained by Caltrans, Division of Traffic Operations, Office of System Management Operations. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2014). Express Lanes, California, 2015. California Department of Transportation. Available at http://purl.stanford.edu/sw139fm0830. For more information about Express lanes, contact to Caltrans, Division of Traffic Operations. The website of California Express Lane is at http://www.dot.ca.gov/hq/traffops/trafmgmt/hov/ The data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Office of Data Services and Technology, GIS Branch makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  20. Title: Traffic Volume, California, 2013

    Contributors:

    Summary: This point shapefile contains traffic volume (also known as traffic counts) on California's state highway network created from 2013 Average Annual Daily Traffic (AADT) counts (excel spreadsheet) maintained by Caltrans, Division of Traffic Operations. Annual average daily traffic is the total volume for the year divided by 365 days. The traffic count year is from October 1st through September 30th. Very few locations in California are actually counted continuously. Traffic counting is generally performed by electronic counting instruments moved from location throughout the State in a program of continuous traffic count sampling. The resulting counts are adjusted to an estimate of annual average daily traffic by compensating for seasonal influence, weekly variation and other variables which may be present. Annual ADT is necessary for presenting a statewide picture of traffic flow, evaluating traffic trends, computing accident rates, planning and designing highways and other purposes. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans). This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. California Department of Transportation. (2014). Traffic Volume, California, 2013. California Department of Transportation. Available at http://purl.stanford.edu/hw699zq7178. The data list 2013 taffic volumes for all count locations on the California state highway system. Peak hours, peak month ADTs and annual ADTs are shown at each count location. Significant volume changes (breakpoints) in the traffic profile along each route are counted and identified by name and milepost value. In addition to the profile breakpoints, these files list county lines and well-known landmarks to aid in orientation. All traffic volume figures listed include traffic in both directions unless otherwise indicated. Reference link: http://www.dot.ca.gov/hq/traffops/saferesr/trafdata/index.htm This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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