The City of McKinney will begin implementing a new left-turn traffic signal display that will include flashing yellow arrows starting today 5/3/2012. At intersections with this new configuration, the flashing yellow arrow means left turns are permitted, but drivers must first yield to oncoming traffic and pedestrians, then turn with caution because oncoming traffic has (a green light) the right of way.
This is a national standard that will be implemented in communities across the country.