In any case, if you are driving between Cambridge and Allston this evening you might want to be on the lookout. My guess is it is the Anderson Memorial Bridge, the one that connects North Harvard St & JFK St.
Memorial Bridge closed tonight - Local News Updates - The Boston Globe
Memorial Bridge in Cambridge will be closed between 7 and 9 tonight for the filming of a movie, State Police said this afternoon. The bridge will be shut down in both directions between JFK Street and Western Avenue. Motorists should seek other routes because traffic is expected to be heavy, police said.