I am looking for a data set that determines geo-tagged location for federal and state roads and can also decipher which roads are not classified as federal or state roads.
Any ideas where this information could be sourced from?
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For the national highway system you will find all the locations/polylines in the National Highway Planning Network dataset at:
You will also find a girth of geocoded data related to the national transportation system (hubs, railways, airports, etc) under the Bureau of Transportation Statistics - Geospatial Information
As far as state routes, I think you will still have to get that data from each state's transportation or geographic survey sites. Here's a few:
If you end up compiling all the state data together, I recommend placing it in github for the benefit of all.
UPDATE: I had forgotten that I had a web page with a collection of state transportation sites (lol):
One may also find other transportation related data portals at the crowdsourced catalog of open data portals (I am a co-founder of) by selecting the category Transportation: