T-75 : Traffic Pleasures

I discovered recently that I can approach a green light while driving and count on how long it will stay green if I pay attention to the "Don't Walk" sign that's counting down the seconds; purportedly to help pedestrians get across the street in time.  I as the driver not wanting to be faced with a decision of whether to speed up or screech to a halt when the light turns yellow reap the fringe benefit.  I wonder why they don't do that at more locations.  At any rate, I'm thankful for this traffic pleasure!