Here are some of my Highway Map photos that I took at the rest areas adjacent to the toll booths. These are the only ones I have so far. I took these in 2010 when I drove from California to Guanajuato via Juarez.
Autopista Durango - Cuencame - Torreon
http://www.flickr.com/photos/jfs1988/4945743613/in/photolist-8x3egB-8x6eZJ-6uW4ZX-8mRNUM/
http://www.flickr.com/photos/jfs1988/4946331392/in/photolist-8x3egB-8x6eZJ-6uW4ZX-8mRNUM/
Autopista Chihuahua - Jimenez
http://www.flickr.com/photos/48980186@N04/4945741007/in/photolist-8x3duF-aSFvFz-aSFhXn-bS97rV-bDeoE5-aVeou6-aVeJMv-bDemgm-8xEuJY-aWy2oi-bUkYr9-bS94Rn-9bcvqo-aVcRwe-aSG2YZ-bUkYcE-aT76J2-bUkXNL-8ueHk3-8ubvVK-8zpoxq-aSFvwM-aSFphg-aWy1uK-8x6bH9-bDem4E-aVeodZ
Awesome. I didn't know they had those but, then again, I hardly ever plan my pitstops for the toll booths.
at Caseta Sacramento, located along Mexico Federal 45 north of the city of Chihuahua, there is a historical information placard with a map that shows the route that Spaniard explorer Juan de Oñate took when he was exploring what today is northern Mexico & the American Southwest. The route is parallel to present Highway 45 & Interstate 25. There is some information of this at the New Mexico Welcome Center (Rest Area) in Anthony. Its too bad, I accidentally deleted that photo when my camera was having a format memory error. :-( Wasnt even able to get in the return trip, oh well.
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http://www.flickr.com/photos/jfs1988/9534237813/in/photostream/
Mexico Highway Map at Caseta Leon Guzman, Dgo MX.
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http://www.flickr.com/photos/jfs1988/9536988970/in/photostream/
Red Viacorta system map at Aguascalientes-Leon.