NEW YORK — Most of the lanes of the Tappan Zee Bridge north of New York City have reopened after a crane collapsed across the entire width of the bridge, but transportation officials are still advising motorists to plan for extra delays during the Wednesday morning commute.

A crane boom from an adjacent bridge project crashed down across the key Hudson River crossing Tuesday, forcing cars to swerve out of the way and halting traffic for hours.

Transportation officials announced Tuesday night that six of the seven lanes on the bridge had reopened ahead of schedule and that the one remaining southbound lane would remain closed until further notice.

No cars were hit when the crane collapsed and no one was significantly hurt.