MIDDLETOWN, NJ - On or about April 1, Monmouth County will begin a construction project to replace the deck on the Route 520 bridge that spans the Swimming River, connecting Red Bank and Tinton Falls. Traffic will be reduced to one lane in both directions on Route 520 between Half Mile Road and Hance Avenue 24 hours a day until the project is complete. Construction period is 4 to 6 months. Expect heavy traffic delays, especially during commuter hours. The Middletown Police Department asks drivers to use alternate routes during construction. There will be no access for pedestrians to cross the bridge during construction.