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This California Enhanced National Highway System (NHS) line feature class is created under the federal authorization MAP-21(Moving Ahead for Progress in the 21st Century). On October 1, 2012 the existing National Highway System (NHS) was expanded to include all existing Principal Arterials (i.e. Functional Classifications 1, 2 and 3) to the new Enhanced NHS.
Under MAP-21, the Enhanced NHS is composed of rural and urban roads nationwide serving major population centers, international border crossings, intermodal transportation facilities, and major travel destinations. The NHS includes:
-The Interstate System.
-Other Principal arterials and border crossings on those routes (including other urban and rural principal arterial routes, and border crossings on those routes, that were not included on the NHS before the date of enactment of the MAP-21).
-Intermodal connectors -- highways that provide motor vehicle access between the NHS and major intermodal transportation facilities.
-STRAHNET -- the network of highways important to U.S. strategic defense.
-STRAHNET connectors to major military installations. |
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This California Enhanced National Highway System (NHS) line feature class is created under the federal authorization MAP-21(Moving Ahead for Progress in the 21st Century). On October 1, 2012 the existing National Highway System (NHS) was expanded to include all existing Principal Arterials (i.e. Functional Classifications 1, 2 and 3) to the new Enhanced NHS.
Under MAP-21, the Enhanced NHS is composed of rural and urban roads nationwide serving major population centers, international border crossings, intermodal transportation facilities, and major travel destinations. The NHS includes:
-The Interstate System.
-Other Principal arterials and border crossings on those routes (including other urban and rural principal arterial routes, and border crossings on those routes, that were not included on the NHS before the date of enactment of the MAP-21).
-Intermodal connectors -- highways that provide motor vehicle access between the NHS and major intermodal transportation facilities.
-STRAHNET -- the network of highways important to U.S. strategic defense.
-STRAHNET connectors to major military installations. |
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California Department of Transportation (Caltrans) |
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This National Highway System dataset was exported from Caltrans Linear Reference System (LRS) on July 18, 2023. The LRS serves as the framework upon which the Highway Performance Monitoring System (HPMS) and other business data are managed. |
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National Highway System is made available to the public solely for informational purposes. Information provided 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 California 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. Reference Links: California Road System (CRS) web map FHWA-NHS Web Map NHS Modification ProceduresCode of Federal Regulations 23 CFR 470 |
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| title:
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National Highway System |
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["Transportation","Functional Classification","Linear Referencing System","LRS","Roads and Highways","California Road System"] |
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en-US |
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0 |
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