From our friends at the Dept. of Conservation and Recreation:

The General Edwards Bridge on Route 1A connecting Lynn and Revere is scheduled to close this weekend to vehicular and pedestrian traffic.  The closure will happen from 3 AM Saturday, May 19 to 5 AM Monday, May 21.  They are testing the counterweights on the bridge span.  If the work is completed earlier than 5 AM Monday, the bridge will open up a bit sooner. 

Traffic will be detoured to Route 107 (Broadway in Revere, Western Ave. in Lynn) during this closure period.