This is a subset of the full dataset, only features in California are used. The data was reprojected to CaSIL's standard projection. There were no changes or alterations to the attribute data. The original metadata is below:
The National Highway Planning Network is a comprehensive network database of the nation's major highway system. It consists of the nation's highways comprised of Rural Arterials, Urban Principal Arterials and all National Highway System routes. The data set covers the 48 contiguous States plus the District of Columbia, Alaska, Hawaii, and Puerto Rico. The nominal scale of the data set is 1:100,000 with a maximal positional error of ±80 meters.
The primary purpose of this geospatial data set is to serve the FHWA needs in highway planning, policy analysis, visualization of the Highway Performance Monitoring System (HPMS) database and network modeling. The NHPN is the digital source used for coding and publishing the FHWA approved National Highway System maps.
The NHPN version 2005.08 contains 8 polyline features (RECIDs 4000057, 4000855, 41000287, 41002220, 48000952, 72001074, 72001170, and 72001488) that are each defined by more than 500 shape points. These features will not import correctly into the workstation version of ArcInfo, which has a 500 shapepoint limit. When importing into the workstation version of ArcInfo, the 8 features will be automatically split into 2 features each. As part of this process, attributes are simply duplicated on the split features. Because of this, attributes such as MILES and KM become invalid for these features.
|Category||Transportation > Roads & Highways|
|Metadata||Dublin Core, FGDC CSDGM, ISO 19115/19139|
|Data type||Vector linestring|
|Attributes||RECTYPE, VERSION, RECID, ORIGID, FNRECID, TNRECID, CTFIPS, SOURCE, LGURB, SMURB, SIGN1, SIGNT1, SIGNN1, SIGNQ1, SIGN2, SIGNT2, SIGNN2, SIGNQ2, SIGN3, SIGNT3, SIGNN3, SIGNQ3, LNAME, MILES, KM, FCLASS, RUCODE, STATUS, NHS, STRAHNET, FAC_ID, CONN_ID, CONN_DES, CONN_MILES, LRSKEY, LRSSEQ, BEGMP, ENDMP, AADT, THRULANES, OWNERSHIP, STFIPS, BTSVERSION|
|Services||Vector Query API|
|Revisions||2 - Browse all revisions|
|Current revision||Imported on April 2, 2009 from Shapefile in NAD83 / California Albers.|