The CBD Bridge Project is the largest project in ALDOT history. Scope of work includes replacement of the I-59/I-20 bridges, approaches on I-59/20 from the I-65 interchange to north of the 31st Street North Interchange. Involves the redesign of the route interchange with I-59/20 and Red Mountain Expressway, as well as the demolition and rebuilding of bridges.
The new CBD replacement bridges will provide a safer design and represent the best option for this vital interstate route through Alabama’s largest city. The elevated portions of I-59/20 through downtown Birmingham’s Central Business District are over 40 years old and in disrepair. Current usage is approximately 160,000 vehicles per day which is twice the design capacity, requiring the replacement and upgrade of the viaduct. The span-by-span construction was done with falsework towers and completed during a one-year shut down of I-59/20 through Birmingham.