PennDOT announced today the posting of Variable Speed Limits (VSL) and Queue Detection and Warning (QDW) messages along 14 miles of the Schuylkill Expressway (I-76) between King of Prussia and Philadelphia.
From the announcement:
Beginning today, 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 (50 mph maximum in City of Philadelphia). This range of speed limits may be slightly adjusted after the performance of the system and traffic progression results are collected and analyzed.
Speed limits posted to the new VSL signs on I-76 (Schuylkill Expressway) will serve as enforceable, regulatory speed limits, not recommended speed advisories. All motorists should follow the posted speed limit on the VSLs.
According to PennDOT, the next phase of improvements are currently in the design phase and 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.