Version FAF4.3. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

FHWA, Office of Highway Policy Information, 2012 National File (PA_NHS.zip) at, Highway Performance Monitoring System (HPMS). Please contact Tom Roff for any questions related to HPMS.

Version FAF4. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF4. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF4. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF4. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF3_5. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF3_5. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Version FAF3_5. FHWA Office of Freight Management and Operations, please contact faf@dot.gov for any questions related to Freight Analysis Framework.

Freight Analysis Framework, FHWA Office of Freight Management and Operations.

The National Network of conventional combination trucks was authorized by the Surface Transportation Assistance Act of 1982 (P.L. 97-424) and specified in the U.S. Code of Federal Regulations (23 CFR 658) to require states to allow conventional combinations on "the Interstate System and those portions of the Federal-aid Primary System … serving to link principal cities and densely developed portions of the States … [on] high volume route[s] utilized extensively by large vehicles for interstate commerce … [which do] not have any unusual characteristics causing current or anticipated safety problems."

Conventional combinations are tractors with one semitrailer up to 48 feet in length or with one 28-foot semitrailer and one 28-foot trailer, and can be up to 102 inches wide.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Environmental Protection Agency (EPA), The Green Book.

Please contact Cecilia Ho at FHWA for any questions related to Non-Attainment/ Maintenance areas or areas subject to transportation conformity analysis.

Updated: 04/05/2017

Data Source: FHWA Office of Planning,
Environment & Realty, Effective 10/01/2012.

Please contact Mike Neathery for any questions related to NHS. You can also read FAQ.

Updated: 07/28/2016

Data Source:
FAP: Highway Performance Monitoring System (HPMS) Truck Routes, Military Traffic Management Command Transportation Engineering Agency (MTMCTEA), National Network (NN) and Enhanced NHS (ENHS) with State DOT verification, FHWA.

NHS: NHS System, Nov. 2016, FHWA

1991 Federal Aid Primary (FAP) system is included in the Primary System definition per U.S.C. Title 23, Section 131 Control of Outdoor Advertising. Please contact Supin Yoder for any questions related to FAP.

National Highway System (NHS), Federal Highway Administration (FHWA), USDOT, Version 2010.11.

FHWA 2010 Adjusted Urban Area - For transportation planning purposes, federal transportation legislation allows for the outward adjustment of Census Bureau defined urban boundaries (of population 5,000 and above) through the cooperative efforts of State and local officials. By Federal rule, these adjusted urban area boundaries must encompass the entire census-designated urban area and are subject to approval by the Secretary of Transportation (23 USC 101(a) (36) - (37) and 49 USC 5302(a) (16) - (17).

Please contact Spencer Stevens for more information.

Federal Highway Administration (FHWA), USDOT, 2012. U.S. Census Bureau, 2010 Decennial Census

*New - 2010 Urbanized Areas, U.S. Census Bureau, March 26, 2012

Federal Highway Administration (FHWA), USDOT, 2011. U.S. Census Bureau, 2000 Decennial Census

*New - 2010 Urbanized Areas, U.S. Census Bureau, March 26, 2012

Data Source:

Date: Oct 13, 2013

Draft Highway Primary Freight Network, Federal Highway Administration, Office of Management and Operations, please contact Ed Strocko for any questions related to PFN or visit PFN website at Freight Network.

Federal Lands of the United States, Federal Atlas of the United States, 2005.
Indian Reservation, Bureau of Indian Affairs (BIA), 2004.

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

NHTSA’s Fatality Analysis Reporting System (FARS) at www.nhtsa.gov/FARS. (Only fatal crashes with latitude/longitude coordinates are included in the map.)

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

MPO Boundaries updated: April 27, 2017
Office of Planning, Federal Highway Administration (FHWA)

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

NHS: FHWA Office of Planning, Environment & Realty, Effective 10/01/2012.

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

County population: Bureau of Census

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

MSA GDP: Bureau of Economic Analysis

Freight Analysis Framework (FAF): Version 3.5, Office of Freight Management and Operations.

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

Planning Travel Time Index: FHWA Office of Operation

Freight Analysis Framework (FAF): Version 3.5, Office of Freight Management and Operations.

Megaregion: FHWA Office of Planning. Note the megaregion boundaries and maps are provided for discussion purposes and do not have formal regulatory or policy standing. For more information please see the Megaregion web page.

Freight Analysis Framework (FAF): Version 3.5, Office of Freight Management and Operations.

County population estimates: Bureau of Census

County population estimates: Bureau of Census

County population estimates: Bureau of Census

County population estimates: Bureau of Census

County population estimates: Bureau of Census

Updated: 01/18/17

Data Source:

Alternative Fuel Corridors: FHWA Office of Natural Environment, Sustainable Transport and Climate Change Team.

Alternative Fuel Locations: Department of Energy Alternative Fuels Data Center.

Please contact Diane Turchetta for any questions related to Alternative Fuel National Corridors or visit Alternative Fuel Corridors.

Updated: 11/22/2016

Data Source:

Alternative Fuel Corridors: FHWA Office of Natural Environment, Sustainable Transport and Climate Change Team.

Alternative Fuel Locations: Department of Energy Alternative Fuels Data Center.

Please contact Diane Turchetta for any questions related to Alternative Fuel National Corridors or visit Alternative Fuel Corridors.

Updated: 11/22/2016

Data Source:

Alternative Fuel Corridors: FHWA Office of Natural Environment, Sustainable Transport and Climate Change Team.

Alternative Fuel Locations: Department of Energy Alternative Fuels Data Center.

Please contact Diane Turchetta for any questions related to Alternative Fuel National Corridors or visit Alternative Fuel Corridors.

Updated: 11/22/2016

Data Source:

Alternative Fuel Corridors: FHWA Office of Natural Environment, Sustainable Transport and Climate Change Team.

Alternative Fuel Locations: Department of Energy Alternative Fuels Data Center.

Please contact Diane Turchetta for any questions related to Alternative Fuel National Corridors or visit Alternative Fuel Corridors.

Updated: 11/22/2016

Data Source:

Alternative Fuel Corridors: FHWA Office of Natural Environment, Sustainable Transport and Climate Change Team.

Alternative Fuel Locations: Department of Energy Alternative Fuels Data Center.

Please contact Diane Turchetta for any questions related to Alternative Fuel National Corridors or visit Alternative Fuel Corridors.