Typically, the doc explains, a yellow light is preset to run for a tenth of the posted speed limit. In cases where the speed limit is less than 30 mph, though, you can still expect a three-second ...

Simple enough. But what happens when you live in a culture where green also means blue? (Before we answer that, here's why our own traffic light colors are red, yellow, and green.) That’s when ...

The bright LED lights are mounted on the side of traffic poles and light up when the ... up and often missing the yellow and entering well after the signal is red.” The pilot program could ...