It is the moment Birmingham drivers have been dreading. The Interstate 59/20 bridges through the downtown area closed Monday night, as part of a replacement project expected to cause major delays. ALDOT is urging drivers to use I-459 as an alternate route. Drivers who stay on I-59/20 will be diverted onto downtown streets for the next 14 months. 5920bridge.com has the full list of detour routes. You can get ALDOT updates to your phone by texting “5920BRIDGE” to 888777.