us coast to coast (The Lincoln Highway)
Hi. Not sure if anyone gave you a definate answer but the official US coast to coast is 'The Linclon Highway', 3200 miles. The Adventure Cycling Association do not do maps, i've tried them, but you can gets various books & websites, this is the main one;
http://lincolnhighway.jameslin.name/ the best book i've found is "The Lincoln Highway, The Graet American Road Trip" ISBN 978-0-393-05938-0. I cycled US Route 66 last year, a gun you say?? Believe me, it's really NOT like you see on TV, well, maybe in LA, where i finished. The US hospitality was SO amazing, still makes me smile, bloody amazing time!
If you can't find maps the use [as i done for some sections of Route 66] Microsofts Streets & Trips (same as our MS Autoroute but for the US)
Like Route 66, The Lincoln highway has gone under mansy realignments & moved as towns grew into cities so you need to do some research...that's was part of the fun for me with 66, sitting there plotting sections & thinking, "wow, i'm gonn a ride it?!!" Remember, preperation is 9/10ths of the job.
Have fun!
Have fun!