Description: The points represent 2014 postmile locations from the TSN database. These points are locked, roughly, every two miles of the route and calibrated. ArcGIS basemap imagery was used to locate landmarks between the scales of 1:10,000 to 1:1,000.
Description: This file represents linework based on the TSN database, including relinquishments, as of September 10, 2014. There were significant changes to 39 state routes, along with other minor changes. In February 2015, route 15S in San Diego county was updated to include an additional segment of the route not identified in the 2014 update. ArcGIS basemap magery was used to identify and verify roadway alignments during the digitizing process.