The bridge was shut down for emergency repairs last April.
It was originally scheduled to reopen mid-November, but was then pushed for additional steel repairs and "weather-related delays," CDOT said.
It reopened to vehicles and pedestrians about 6 a.m. Friday.
The rehab work on critical structural and operational components has now been completed. The bridge was built in 1949.
SEE ALSO | CTA State and Lake station 3-year closure takes effect | What to know
The Lake Street, Chicago-Halsted and Cortland bridges are also closed.
The State and Lake elevated CTA station, also a CDOT project, is closed, as well, until 2029. That construction is creating additional street closures in the area.