PERKIOMEN VALLEY Transportation officials are adding two stoplights to improve traffic flow in the Perkiomen Valley.

One will go at the intersection of Cider Mill and Arcola Roads in Collegeville, where the Arcola Road bridge crosses Perkiomen Creek.

The bridge, which dates to 1931, was shut down in August due to safety concerns. The county is rebuilding the bridge, and on Thursday approved a contract for design services to add a stoplight at its western end.

Before its closure, the Arcola Road bridge carried an average of 8,250 cars a day. Construction on the new bridge is on schedule to start in the late summer or early fall of 2014, said Kenneth Starr, director of assets and infrastructure for the state Department of Transportation.

The other stoplight is planned for Plank Road and Route 29 in Perkiomen Township.

PennDot determined that road to be a major artery and requested county approval to straighten the intersection and add a four-way traffic signal.

Instead of paying to obtain the county right-of-way, PennDot will make improvements to the nearby Perkiomen Trail. - Jessica Parks