There was a time when there were no Left Green, Red or Yellow Arrows.
This is the way it worked; You are the first car at an intersection, you want to turn left, the light is Red. There are cars behind you. Cars are facing you at the same intersection, they too have a red light. They may be turning right, left or going straight but you wouldn't know because no one uses blinkers. You don't want others to know your intentions. Tension mounts waiting for Green. Its like the end of The Good, The Bad and The Ugly. Who draws first?
The instant the light turns Green you accelerate rapidly and beat 'em out. You've done it. Glancing in your mirror they guy behind - beat 'em out too.
If you are behind someone who DID NOT beat our the oncoming cars, you would be on your horn, swearing at the moron. How is it possible people didn't know how Driving in Boston is done.
I've seen cars with Mass plates do this in other states. Typical, predictable.
That was then, this is now: Left Green, Yellow and Red arrows are almost everywhere even where they're unnecessary. Someone in the Commonwealth concluded that Arrows would be helpful.
I'm willing to beat out any oncoming traffic at a similar intersections. But aggravation seeps into your veins when behind someone who doesn't know what to do when the Light goes Green.