The Federal Highway System has a lower limit on bridges and overpasses of 13' 8" I believe. You shouldn't have any problem traveling on the Federal System. The State & Other systems don't have that requirement. CountryGuy's suggestion of a truckers map will give you most of the info on bridges. But since construction is always ongoing you need to keep on eye on the signs and travel accordingly.
Good Luck
You can also get software that can help ex.
http://www.ultimateroute.com/ is software for truckers.