Having closed the bridge to both pedestrian and vehicular traffic, the filmmakers used hired extras and professional drivers to simulate regular traffic during filming. Here, six hired cars and a motorcycle wait on the Cambridge side of the bridge for the go-ahead from the film crew.

Eric D. Schmiedl—The Tech

Having closed the bridge to both pedestrian and vehicular traffic, the filmmakers used hired extras and professional drivers to simulate regular traffic during filming. Here, six hired cars and a motorcycle wait on the Cambridge side of the bridge for the go-ahead from the film crew. Eric D. Schmiedl—The Tech