Originally Posted By: brianl703
If there are cars waiting on the side street, it will keep giving the main street the maximum green which has been programmed, and then give the side street maximum green because there are cars waiting on the main street.
Now you'd have to be a complete moron to configure a traffic light this way, and it would cause total gridlock. But it would still change colors in the correct sequence so the city could play dumb and say they can't find any problems with it..which, given the caliber of some of the people who work on these things, could be entirely accurate.
This type of configuration works in high traffic area when any slowing in the on going traffic is going to be more wasteful than a little longer on the light cycle. I've seen as long as 2 minutes on a cycle of side street but even with 2 minutes, you still can't get all the cars out of the way.
Seems like they haven't spend the time to calibrate the right duration for the road.
The worst I've seen in the San Jose area here:
You have a light rail that will turn its signal green when it is near, and when it turns its signal green, it will interrupt all the cycle of main left turn / main forward / side left turn / side forward, and start again at the main left turn instead of continue where it previously left off. I frequently stop at the side forward and get interrupted out of cycle when it was about to be my turn. My record is 5 minutes at that red light, and I end up making a right turn and left turn combo now instead.