Town tries out new left-turn signal - East Valley Tribune: Gilbert

Town tries out new left-turn signal

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Posted: Thursday, February 16, 2012 2:22 pm

Gilbert is testing a new type of flashing left-turn signal to determine whether it can reduce the number of left-turn collisions at a Loop 202 freeway interchange. The town activated the signal Wednesday for drivers going northbound as they turn left onto the freeway at San Tan Village Parkway.

The signal is known as a flashing yellow arrow, and it uses a system of red, yellow and green arrows. The signal uses a standard green arrow to indicate drivers have the right-of-way, then progresses to a flashing yellow arrow to indicate drivers may turn left after yielding to oncoming traffic. Then, a steady arrow appears to warn drivers they should prepare to stop before the red arrow is activated.

The flashing yellow signal was adopted recently by the Federal Highway Administration after nationwide research showed it heightens driver awareness when turning left in front of oncoming traffic. Gilbert will evaluate the signal's effectiveness before deciding if it will install the flashing yellow arrow at other intersections. For more information, visit

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