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First Flashing Yellow Arrow Signal in Pennsylvania Now Operational


​Harrisburg, PA –  The first Flashing Yellow Arrow signal in Pennsylvania was activated this morning in Lower Allen Township, Cumberland County, and is now operational. It is located on eastbound Rossmoyne Road, at the northbound on-ramp in the interchange with Route 15. This is a new type of left turn traffic signal that has been proven to improve left turn safety at signalized intersections.
The Flashing Yellow Arrow signal is new to Pennsylvania, but they have become commonplace in many states across the country over the last 10 years. Based on studies and transportation agency testimonials, Flashing Yellow Arrow signals improve left-turning safety by helping motorists recognize that they should yield while making left turns when there is oncoming traffic and pedestrians.

“Our goal with this change is to add a reminder that once the green left arrow stops showing, drivers need to yield to oncoming traffic and pedestrians before proceeding to make a left turn at a signalized intersection,” said PennDOT Secretary Leslie S. Richards. “The flashing yellow arrow means yield to oncoming traffic and pedestrians and then proceed with caution.”
According to the Federal Highway Administration (FHWA), left turn crashes can be reduced by as much as 20 percent after the installation of the Flashing Yellow Arrow signal. Also, Flashing Yellow Arrow signals can be adjusted depending on the time of day, reducing delays and improving mobility.
Rossmoyne Road is officially designated at State Route 2021, and this intersection with the on-ramp to northbound Route 15 is located adjacent to the busy Rossmoyne Business Center. There is a history of left-turn safety issues when turning from Rossmoyne Road onto the on-ramp for northbound Route 15. PennDOT will monitor this location and other isolated installations across Pennsylvania before proceeding with widespread deployment of the Flashing Yellow Arrow signals.
More information on flashing Yellow Arrow signals and other traffic signal initiatives is available at in the traffic signals section of “Travel in PA”.