Of Streets and Traffic Lights

I always had this sneaking suspicion that of the three states that I have lived in, Pennsylvania had by far the worst street and highway system. Well, driving home from Thanksgiving confirmed that suspicion.

I had stopped at an intersection by my apartment to wait for the traffic light to change. When the traffic light turned from red to green, it did not so much as change from red to green, but continued to display red, while it turned green on as well.

So I propose this to you, if given a traffic light displaying both green and red, are you to stop? To go? This seems like something that should tear apart the fabric of time and space.