Speed limits in Alabama depend on the type of road you’re driving along. On major interstates, the speed limit is 70mph and on roadways with four or more lanes, 65mph. On all other roadways, the speed limit is 55mph and on country roadways, the speed limit is 45mph. In residential zones, the speed limit can go down to 35mph. Be sure to watch for sign postings indicating the appropriate speed limit in order to be sure. There are no speed cameras in Tuscaloosa, although police cars will sometimes check for speeding drivers. Search car hire on KAYAK