A temporary traffic signal will be activated at noon Tuesday on Route 3 on each side of the John Andrew Twigg Bridge between Mathews and Middlesex counties.

The signals will be operational 24 hours a day, seven days a week, during the two-year bridge rehabilitation project.

One travel lane will be closed on the bridge throughout the project, Virginia Department of Transportation spokesman Kelly Hannon said, with northbound and southbound traffic alternating crossing the bridge in a single travel lane. A concrete barrier will separate traffic from the work zone on the bridge.

There is a width-restriction for vehicles on the bridge during the project, with vehicles wider than 10 feet having to make a detour around the bridge.

The Commonwealth Transportation Board awarded a $10.9 million contract to Precon Marine, Inc. to repair the bridge. Work began this spring, Hannon said, and the project completion date is May 2014.

This project will rehabilitate the two-lane Twigg Bridge...