U.S. National Transportation Atlas Major Road Net represents rural interstates and arteries; and urban freeways, expressways, interstates, and arteries. U.S. National Transportation Atlas Major Road Net is part of the National Highway Planning Network version 2.1 published by the Bureau of Transportation Statistics as part of the National Transportation Atlas Databases for the United States. This shapefile covers only the south central, and the eastern half of the US. NBII-SAIN (ed.) created this file by clipping from from ESRI 2002 majrdnet.shp. NBII-SAIN website: (http://sain.nbii.gov/).
Largest scale when displaying the data: 1:250,000. Includes a network index directory (.nws) to improve network analysis efficiency.
publication date
The lines represent a comprehensive network database, suitable for routing, of the principal arterial highway system and other National Highway System routes for United States.(Source:
Bureau of Transportation Statistics)
Internal feature number.(Source:
ESRI)
Feature geometry.(Source:
ESRI)
The descriptive name for the road feature.(Source:
Bureau of Transportation Statistics)
A composite field of the primary sign route that identifies the type, sign route number that can include a directional indicator, and a qualifier. The first character identifies the type, the following characters up to but not including a blank identify the sign route number that can include a directional indicator, a blank, and the last character identifies the qualifier.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| Type, represented by the first character. |
(blank) - not signed, I - Interstate, U - U.S. route, S - State route, O - Off-Interstate business marker, C - County route, T - Township, M - Municipal, P - Parkway or Forest route marker, N- None of the above. |
| Sign route number (can include a directional indicator), represented by all the following characters up to but not including a blank. |
Any combination of: A–Z, 0–9, N, S, E, W. |
| A blank space. |
This separates the sign route number from the qualifier. |
| Qualifier, represented by the last character when preceded by a blank. |
(blank) - No qualifier, not signed, or not applicable; A - Alternate route; B - Business route; P - Bypass; S - Spur; L - Loop; F - Proposed (future); D - Temporary (detour); T - Truck route; N - None of the above. |
A composite field of an alternate sign route that identifies the type, sign route number that can include a directional indicator, and a qualifier. The first character identifies the type, the following characters up to but not including a blank identify the sign route number that can include a directional indicator, a blank, and the last character identifies the qualifier.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| Type, represented by the first character. |
(blank) - not signed, I - Interstate, U - U.S. route, S - State route, O - Off-Interstate business marker, C - County route, T - Township, M - Municipal, P - Parkway or Forest route marker, N- None of the above. |
| Sign route number (can include a directional indicator), represented by all the following characters up to but not including a blank. |
Any combination of: A–Z, 0–9, N, S, E, W. |
| A blank space. |
This separates the sign route number from the qualifier. |
| Qualifier, represented by the last character when preceded by a blank. |
(blank) - No qualifier, not signed, or not applicable; A - Alternate route; B - Business route; P - Bypass; S - Spur; L - Loop; F - Proposed (future); D - Temporary (detour); T - Truck route; N - None of the above. |
A composite field of an alternate sign route that identifies the type, sign route number that can include a directional indicator, and a qualifier. The first character identifies the type, the following characters up to but not including a blank identify the sign route number that can include a directional indicator, a blank, and the last character identifies the qualifier.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| Type, represented by the first character. |
(blank) - not signed, I - Interstate, U - U.S. route, S - State route, O - Off-Interstate business marker, C - County route, T - Township, M - Municipal, P - Parkway or Forest route marker, N- None of the above. |
| Sign route number (can include a directional indicator), represented by all the following characters up to but not including a blank. |
Any combination of: A–Z, 0–9, N, S, E, W. |
| A blank space. |
This separates the sign route number from the qualifier. |
| Qualifier, represented by the last character when preceded by a blank. |
(blank) - No qualifier, not signed, or not applicable; A - Alternate route; B - Business route; P - Bypass; S - Spur; L - Loop; F - Proposed (future); D - Temporary (detour); T - Truck route; N - None of the above. |
The length of the road feature in miles.(Source:
Bureau of Transportation Statistics)
The length of the road feature in kilometers.(Source:
Bureau of Transportation Statistics)
The toll indicator for the road feature.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| 0 |
Not a toll road. |
| 1 |
A toll road. |
The number of lanes in both directions for the road feature.(Source:
Bureau of Transportation Statistics)
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 10 |
The type of median for the road feature.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| 0 |
Unknown. |
| 1 |
Divided highway. |
| 2 |
Undivided highway. |
The assigned functional class description for the road feature.(Source:
Bureau of Transportation Statistics)
| Value | Definition |
|---|---|
| Rural Interstate |
Rural Interstate. |
| Rural Minor Arterial |
Rural Minor Arterial. |
| Rural Principal Arterial |
Rural Principal Arterial. |
| Unclassified |
Unclassified. |
| Urban Freeway or Expressway |
Urban Freeway or Expressway. |
| Urban Interstate |
Urban Interstate. |
| Urban Minor Arterial |
Urban Minor Arterial. |
| Urban Principal Arterial |
Urban Principal Arterial. |
Members of the Geographic Information Systems Laboratory, Pellissippi Research Institute, The University of Tennessee, Knoxville.
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U.S. National Transportation Atlas Major Road Net provides a comprehensive database, suitable for routing, of the nation's principal arterial highway system and other National Highway System routes.
Attribute and geospatial data
The general processing steps for the creation of the National Highway Planning Network: - Conflation of attributes for rural highways from [National Highway Planning Network V1.1, Bruce Peterson, Oak Ridge National Laboratory, 1992] to [USGS Digital Line Graph (DLG-3, 1978) Series] road alignments using R-MATCH software developed by the Geographic Information Systems Group, University of Tennessee. - Digitizing and conversion of state supplied digital and map data. Line work geodetically controlled to match [USGS Digital Line Graph (DLG-3, 1978) Series] line work. -Integration of conflated version of [National Highway Planning Network V1.1, Bruce Peterson, Oak Ridge National Laboratory, 1992] and assimilated State Data into a comprehensive topologically integrated network database. States edgematched. -Integration of supplemental State Data into the National Highway Planning Network Version 2. Note: "National Highway Planning Network Version 2 Machine Readable Data Files" prepared by the Federal Highway Administration, Office of Environment and Planning (HEP-11), Washington DC, 1994
The following steps were performed by ESRI: Extracted data set from the National Highway Planning Network v2.1, and then generalized. Removed unneeded attributes. Converted to North American Datum of 1983 (NAD83). Recalculated any attributes based on length. Created a network index directory (.nws). Created ArcGIS™ layer file (.lyr). Created ArcView legend file (.avl). Created projection file (.prj). Ran ArcView Avenue request ExportClean, and created spatial indices.
Metadata imported.
The original positional accuracy of the data set had a maximal positional error of 80 meters, and then it was generalized (tolerance unknown). The positional accuracy is unknown.
After processing, the data set is checked for drawing display and number of records and file sizes compared with source materials. This shapefile covers only the south central, and the eastern half of the US. NBII-SAIN (ed.) created this file by clipping from from ESRI 2002 majrdnet.shp. NBII-SAIN website: (http://sain.nbii.gov/).
No duplicate features are present. The shapefile is exported using Avenue request ExportClean. This request verifies and enforces the correctness of shapes.
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See use constraints.
Data format: |
in format SHP
The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml (optional).Size: 11.907 |
|---|---|
Media you can order: |
ESRI Data & Maps 2002 CD–ROM Set is available only as part of ESRI® software. (Density 650 MB (megabytes)) (format ISO 9660) |
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