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Traffic Signals, Management

PennDOT plays an active role in keeping people and goods moving through the state. Whether it's ensuring traffic management procedures and best practices are followed, or providing assistance to local governments for traffic signals, the department has many resources available.

For example, information on funding programs, engineering, design and more is available through PennDOT's Traffic Signal Portal.


Flashing Yellow Arrow

PennDOT is implementing a new type of traffic signal to provide a safer, more efficient left turn for motorists. The flashing yellow arrow indication is a new type of display that will replace the circular green indication for left turns at signalized intersections.

The signal is more intuitive to motorists and, according to national data, can reduce left-turn crashes by as much as 20 percent!

Learn more on the Flashing Yellow Arrow Fact Sheet (PDF) and view how to drive through a flashing yellow signal with our video. Visit the Traffic Signal Portal's Flashing Yellow Arrow page to see technical guidance and other signal information.