[Christ]

Carlos -

Pennsylvania lights are on two different wires per intersection, hung directly over the cross walks. This makes for more wires, which means more transmission loss, but also that as you come up to the intersection, you can view the opposing light, which allows you to make a judgement call if you can't figure out the traffic pattern.

As soon as you enter NY state (I live near the border, travel to NYS often), the lights are strung diagonally across the intersection, saving on wiring and latent/transmission losses, and wiring installation/maintenance, pole installation/maintenance, etc... but its' a PITA when you can't see the opposite light at times. Not all intersections are created equal... and if you're not familiar with the intersection, it's a bit harder to judge the pattern of traffic exiting it.