When the Interstate System was first developed in the 1940s, the federal government specified that interstate highways weave through all American cities with populations greater than 100,000 people, at locations that could be easily accessed by a majority of the population. In practice, this meant the interstate was often run through the center of town, or alongside heavily populated residential areas. Because of age, the Alabama Department of Transportation has begun an effort to improve and replace the elevated portions of Interstate 59/20 through downtown Birmingham. Information on the scope of this project can be found at this site. In addition, it will be periodically updated to keep you informed of our progress.