Bridge Construction Visualization – A 4D Approach to Construction Staging

The North Washington Street Bridge on Route 99 is an important Boston arterial. It is the Easternmost bridge over the Charles River and provides local residents, commuters and bus riders with a vital connection between downtown Boston and Charlestown. It is also part of Boston’s famed FreedomTrail, connecting the North End neighborhood with other tourist destinations such as Bunker Hill and the U.S.S. Constitution.

Over more than a century of service, the bridge has been reconfigured and repaired multiple times to extend its lifespan. It currently costs the City of Boston between $3-5 million each year to keep it operational. Construction of a new “complete streets over water” bridge started in late 2018 and is expected to take up to 5 years to complete. Construction will include erection of a temporary parallel bridge, and several stages involving rerouting of traffic on the bridge and at the intersections on each end.