Missouri's Department of Transportation produces traffic volume maps which post the average number of vehicles on a state highway on any given day. A quick search shows that lots of states and regions provide this service. Here's one central repository of links. I see that website was last updated five years ago, which is a big chapter in the story of the WWW. I like the picture of the office for Traffic Engineering Services, Inc. Traffic is not a problem!
Even if you're not a longhaul truck driver, you might find this exclusive website useful.
Even if you're not a longhaul truck driver, you might find this exclusive website useful.