The Bowker Overpass on Storrow Drive has reopened after temporary repairs were made to the ramp feeding traffic into the Kenmore Square neighborhood.
State Police said the ramp reopened around 11 a.m. today.
The off-ramp from the overpass to Commonwealth Avenue had been shut down since about 7:30 a.m. after a large pothole opened up on the roadway, which has undergone frequent repairs.
Officials said the pothole, described as a foot wide and 12 feet long, was so large that debris crumbled through the roadway onto a grassy area near the Muddy River below.
State Police said the ramp will be open for the evening commute. A permanent fix is expected to be done overnight, State Police said.
No injuries were reported.
In 2009, a piece of concrete fell from a nearby section of the overpass, near Boylston Street, smashing a car's rear windshield.