PennDOT begins posting variable speed limits on on I-76 Schuylkill Expressway

May 12, 2021

Last month, PennDOT activated 72 VSL signs and an end-to-end QDW system along I-76

The Pennsylvania Department of Transportation (PennDOT) has recently posted Variable Speed Limits (VSL) and Queue Detection and Warning (QDW) messages along 14 miles of I-76 (Schuylkill Expressway) between King of Prussia and Philadelphia.

Last month, PennDOT activated 72 VSL signs and an end-to-end QDW system along eastbound and westbound I-76 (Schuylkill Expressway) from the Pennsylvania Turnpike in Montgomery County, to the U.S. 1 North (Roosevelt Expressway) Interchange in Philadelphia. The initial activation began a technology testing period and allowed drivers to become accustomed to the new signs.

Beginning this week, I-76 (Schuylkill Expressway) motorists will notice speed limits begin to change based on real-time travel conditions. This is an indication of congestion occurring ahead and an effort to improve the flow of traffic and reduce stop-and-go conditions and the potential for rear-end crashes.

Existing static speed limit signs have been removed and posted speed limits will begin to change along the corridor. Initially, the VSL signs will vary between 35 mph and 55 mph based on real-time traffic and safety conditions.

The activation of the VSL and QDW systems is the first phase of a long-range, comprehensive, multimodal transportation management plan designed to enhance travel and safety along the I-76 (Schuylkill Expressway) corridor between King of Prussia and Philadelphia, PennDOT says.

The next phase, currently in design, will include additional active traffic management strategies such as the modernization of traffic signal systems along several roadways running near the expressway, and transforming the existing shoulders on portions of I-76 (Schuylkill Expressway) to accommodate an additional travel lane or “flexible” travel lane during peak travel times.

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SOURCE: Pennsylvania DOT

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