U.S. Geological Survey 199911 Reston, Virginia U.S. Geological Survey <http://nationalatlas.gov/atlasftp.html> This data set portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the individual State roads layers from the 1:2,000,000-scale Digital Line Graph (DLG) data produced by the USGS. This is a revised version of the March 1999 data set. These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the U.S. Geological Survey in the use of these data. 1972 1999 ground condition Complete Irregular 170 -64 72 17 None roads highways Interstate highways None USA United States U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology. Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Massachusetts Maryland Michigan Minnesota Missouri Mississippi Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Puerto Rico Virgin Islands U.S. Virgin Islands None None. Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey would be appreciated in products derived from these data. Steve Kambly U.S. Geological Survey mailing address

561 National Center

Reston VA 20192 703-648-5094 skambly@usgs.gov The data set was checked for topological consistency using the Arc/INFO command BUILD. No other checks for logical consistency were performed on this data set. This data set includes roads for all 50 States, Puerto Rico, and the U.S. Virgin Islands. Data completeness generally reflects the content of the original DLG files. U.S. Geological Survey 1995 Reston, VA U.S. Geological Survey 2000000 CD-ROM 1970 1995 ground condition 2MILRD spatial and attribute information U.S. Geological Survey 1998 Reston, Virginia U.S. Geological Survey 2000000 online 1998 publication date ATLAS-RD98 spatial and attribute information U.S. Geological Survey 199903 Reston, Virginia U.S. Geological Survey 2000000 online 1999 publication date ATLAS-RD9903 spatial and attribute information U.S. Geological Survey 1996 Reston, Virginia U.S. Geological Survey 2500000 paper 1996 publication date USGS_AK spatial and attribute information The 2MILRD data files were originally digitized by the National Mapping Division based on the sectional maps contained in 'The National Atlas of the United States of America' published by the USGS in 1970. The files were updated and the Arc/INFO software command DLGARC was used to convert the State DLG optional-format files to Arc/INFO coverages. The individual State coverages were then merged together using the Arc/INFO command APPEND. 2MILRD 1998 ATLAS-RD98 Roads for Puerto Rico and the U.S. Virgin Islands were added. 2MILRD ATLAS-RD98 1999 ATLAS-RD9903 Some roads in Alaska were determined to be trails, and were deleted. Some ferry crossings in Alaska were added, others modified. ATLAS-RD9903 USGS_AK 199910 U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and The Outlying Areas of the United States, and Associated Areas (FIPS 5-2): Washington, D.C., National Institute of Standards and Technology. Vector Complete chain 47014 0.000278 0.000278 Decimal degrees North American Datum of 1983 GRS1980 6378137 298.257222 Road (described by Roadtrl020.dbf) An open way for the passage of vehicles. U.S. Geological Survey Shape The representation of the entity in the data. U.S. Geological Survey Polyline 1-dimensional element that may or may not surround a 2-dimensional element. ESRI GIS software Fnode_ Internal number of the from-node. U.S. Geological Survey 1 29145 Tnode_ Internal number of the to-node. U.S. Geological Survey 2 29144 Lpoly_ Internal number of the polygon to the left of the arc. U.S. Geological Survey 0 0 Rpoly_ Internal number of the polygon to the right of the arc. U.S. Geological Survey 0 0 Length The length of the arc in coverage units. U.S. Geological Survey 0.000 8.512 Roadtrl020 Internal feature number. U.S. Geological Survey 1 47014 Feature The type of road. U.S. Geological Survey Ferry Crossing A route used to transport traffic between two points separated by water. U.S. Geological Survey Ferry Crossing Toll Road A route used to transport traffic between two points separated by water and where a travel fee is collected. U.S. Geological Survey Limited Access Highway A route that is part of the United States Interstate Highway System or other similar expressway. U.S. Geological Survey Limited Access Highway Alternate Route A route that substitutes for a United States Interstate Highway or other similar expressway. U.S. Geological Survey Limited Access Highway Business Route A route that is part of the United States Interstate Highway System or other similar expressway and that is used for commercial traffic. U.S. Geological Survey Limited Access Highway Bypass Route A route that is part of the United States Interstate Highway System or other similar expressway, and that diverts traffic around a town. U.S. Geological Survey Limited Access Highway In Tunnel A route that is part of the United States Interstate Highway System or other similar expressway, and that goes through a tunnel. U.S. Geological Survey Limited Access Highway In Tunnel Toll Road A route that is part of the United States Interstate Highway System or other similar expressway, and that goes through a tunnel and where a travel fee is collected. U.S. Geological Survey Limited Access Highway Toll Road A route that is part of the United States Interstate Highway System or other similar expressway, and where a travel fee is collected. U.S. Geological Survey Limited Access Highway Truck Route A route that is part of the United States Interstate Highway System or other similar expressway, and that is designated for truck traffic. U.S. Geological Survey Other Highway A minor State-numbered route or other connector road. U.S. Geological Survey Other Highway Alternate Route A route that substitutes for a minor State-numbered route or other connector road. U.S. Geological Survey Other Highway Business Route A minor State-numbered route or other connector road that is used for commercial traffic. U.S. Geological Survey Other Highway Bypass Route A minor State-numbered route or other connector road that diverts traffic around a town. U.S. Geological Survey Other Highway Toll Road A minor State-numbered route or other connector road where a travel fee is collected. U.S. Geological Survey Other Through Highway A major State-numbered route or a minor United States-numbered highway. U.S. Geological Survey Other Through Highway Alternate Route A route that substitutes for a major State-numbered route or a minor United States-numbered highway. U.S. Geological Survey Other Through Highway Alternate Route Bypass Route A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that diverts traffic around a town. U.S. Geological Survey Other Through Highway Business Route A major State-numbered route or a minor United States-numbered highway that is used for commercial traffic. U.S. Geological Survey Other Through Highway Business Route Alternate Route A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that is used for commercial traffic. U.S. Geological Survey Other Through Highway Bypass Route A major State-numbered route or a minor United States-numbered highway that diverts traffic around a town. U.S. Geological Survey Other Through Highway In Tunnel Alternate Route A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that goes through a tunnel. U.S. Geological Survey Other Through Highway Toll Road A major State-numbered route or a minor United States-numbered highway where a travel fee is collected. U.S. Geological Survey Other Through Highway Truck Route A major State-numbered route or a minor United States-numbered highway that is designated for truck traffic. U.S. Geological Survey Principal Highway A major United States-numbered highway or one of the most important State-numbered routes. U.S. Geological Survey Principal Highway Alternate Route A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes. U.S. Geological Survey Principal Highway Alternate Route Bypass Route A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes, and that diverts traffic around a town. U.S. Geological Survey Principal Highway Business Route A major United States-numbered highway or one of the most important State-numbered routes that is used for commercial traffic. U.S. Geological Survey Principal Highway Business Route Alternate Route A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes, and that is used for commercial traffic. U.S. Geological Survey Principal Highway Bypass Route A major United States-numbered highway or one of the most important State-numbered routes that diverts traffic around a town. U.S. Geological Survey Principal Highway In Tunnel A major United States-numbered highway or one of the most important State-numbered routes that goes through a tunnel. U.S. Geological Survey Principal Highway In Tunnel Toll Road A major United States-numbered highway or one of the most important State-numbered routes that goes through a tunnel, and where a travel fee is collected. U.S. Geological Survey Principal Highway Toll Road A major United States-numbered highway or one of the most important State-numbered routes where a travel fee is collected. U.S. Geological Survey Principal Highway Truck Route A major United States-numbered highway or one of the most important State-numbered routes that is designated for truck traffic. U.S. Geological Survey Name The name of the road U.S. Geological Survey There is no predefined set of valid road names. State_fips The 2-digit Federal Information Processing Standard (FIPS) code used by the U.S. Bureau of the Census, for the State or State equivalent in which the road is located. U.S. Geological Survey Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas, FIPS 5-2. U.S. Department of Commerce State The 2-letter FIPS code for the State or State equivalent in which the road is located. U.S. Geological Survey Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas, FIPS 5-2. U.S. Department of Commerce Earth Science Information Center, U.S. Geological Survey mailing address

507 National Center

Reston VA 20192 1-888-ASK-USGS (1-888-275-8747) 703-648-5920 In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at <http://mapping.usgs.gov/esic/esic_index.html>. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data. ESRI Shapefile <http://nationalatlas.gov/atlasftp.html> CD_ROM tar SDTS <http://nationalatlas.gov/atlasftp.html> CD_ROM tar There is no charge for the online option. For National Atlas files ordered on CD-ROM there is a base price of $45.00 per disc, a handling fee of $5.00, and a per-file charge based on file size. The charge for files less than 10 megabytes in size is $1.00. The charge for files that range in size from 10 to 150 megabytes is $7.50. The charge for files of 150 megabytes or larger is $15.00. The charge is $7.50 for the Major Roads of the United States data set. To order files on CD-ROM, please see <http://nationalatlas.gov/atlasftp.html#q12>. 20010925 Peg Rawson U.S. Geological Survey mailing address

521 National Center

Reston VA 20192 703-648-4183 atlasmail@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 None Unclassified None