I've come in search of roadway data. Particularly rural roadways. I'm trying to mock up a proof of concept. I would like a national set but at this point any US location would be nice.
Attributes that I'm interested are:
Roadway slope (grade)
Super elevations (banking)
Does anyone know an agency that provides this in a Shapefile, KML, etc.
Thanks you in advance.
Edited by MapFace, 08 July 2012 - 10:42 PM.