NORFOLK, Va. (WVEC) -- A traffic safety gate at the Berkley Bridge will need to be replaced after a tractor trailer knocked the existing gate into the Elizabeth River on Thursday.

Virginia Department of Transportation spokeswoman Paula Miller told 13News Now the tractor trailer that hit the safety gate did not stop. They were able to get the truck's license plate number, and that information has been handed over to Virginia State Police.

The broken gate fell into the Elizabeth River below.

The gate uses an arm, located on the westbound side of the bridge, to stop traffic for bridge openings.

Miller said traffic on the bridge was not affected by the damage but because of the broken gate, crews could not open the bridge for ships in the river. A scheduled 11 a.m. bridge opening could not take place.

Bridge personnel stopped traffic around 1 p.m. Thursday so the bridge could lift for a ship that should have gone past Thursday morning, Miller said.

VDOT will replace the broken gate arm Thursday night. There will be a single lane closure on I-264 west at the bridge from 7 p.m. to 9 p.m. Motorists can expect delays

VDOT also plans to eventually recover the broken gate that fell into the river.