non freeway routes across U.S.

[Big-Bob]

I have become interested in crossing the U.S. on a Yamaha Zuma 125, also known as a BWS 125. It is to small to be freeway legal here. I would appreciate any information on maps/resources that would help me put together a route that does not use freeways. I looked at cycling maps, but many states allow bicycles to ride on the shoulders of freeways, but not motor vehicles.