Drivers beware the Williamsburg Bridge this weekend: NYC Dept. of Transportation will be doing maintenance on the overhead structures and will need to close off three Manhattan-bound lanes. Two Brooklyn-bound lanes will be reversed, and all truck traffic is detoured to the Manhattan Bridge. The closure will be in place from 3am to 8pm both Saturday and Sunday.

Additional traffic enforcement agents and tow trucks will be making the rounds. The bicycle and pedestrian lanes will remain open, however, the lanes that approach the bridge in the median of Delancey Street will be closed. Cyclists will have to access the bridge path from the south side of Delancey and Clinton.

The Brooklyn approach has its own issues.

“Although trucks are detoured to the Manhattan Bridge during these closures, some trucks may try to disobey the detour and access the Williamsburg Bridge anyway,” said Lee Wilson, Community Liaison with Sam Schwartz Engineering, the firm in charge of repair work for the bridge. If this happens, flaggers will be present to direct the tracks back off the bridge — they will need to cross over the pedestrian-bicycle lane to exit the bridge at S. 5th Street.

DOT is replacing the bridge’s tower struts and painting tower tops and cables, as well as fixing the plates which connect the outer and inner roadway floor beams through the main tower, Wilson said.