Tredyffrin Township is the proud recipient of the 33rd Annual Road and Bridge Safety Improvement Award (Roadway category), presented at the 93rd Annual Educational Conference of the Pennsylvania State Association of Township Supervisors. The Township undertook the road and intersection improvement project as a short-term measure to address congestion and safety issues on Route 252 between Central Avenue and Route 30. An existing Amtrak bridge over Route 252 funnels down traffic from two lanes at the intersection to one lane under the bridge.
A feasibility study recommended three long-term remedies that would have cost between $55 million and $66 million and would include replacement of the bridge. Due to funding constraints, the Township opted for short-term mitigation to improve safety and traffic flow until funds are available to replace the bridge.
“We looked at how we could improve the existing infrastructure at a lower cost,” Township Engineer Stephen Burgo, P.E., says. “This was much more economical.”
The project, a partnership effort between PennDOT and Tredyffrin Township, was 100% Federally funded and included the following improvements:
- shifting the northbound lanes on Route 252 south of Route 30 to align them with the lanes north of Route 30 to improve sight distance;
- modifying the signal phasing to add left turn arrows on Route 252;
- adding a turn lane on Route 252 southbound at its intersection with Maple Avenue, along with pavement markings, restriping, and curb revisions on Maple Avenue to improve vehicle turning movements;
- adding pavement markings and signage on Route 252 north of the bridge to designate a formal lane merger, plus new sidewalks, pavement, drainage, striping, and delineators under the bridge;
- adding pedestrian enhancements, such as new sidewalks and crosswalks, ADA-compliant ramps, and brick sidewalk inlays;
- installing an adaptive signal system to respond to traffic volume and flow; and
- installing emergency pre-emption traffic signal technology and vehicle detectors at the intersection of Routes 252 & 30.