Q: What are the rules about crosswalks at intersections with signal lights? Many people think that if they are in a crosswalk and the light is green for the automobile, they can still cross. Please ...

There are few things in this world that are more mildly infuriating than being stopped at a deserted intersection at a red light that just won't change. You have already read my article about ...

A traffic signal has been the topic of local debate ever since it was installed four years ago. The problem now? That traffic ...

With GPS data from as little as 6% of vehicles on the road, researchers can recalibrate traffic signals to significantly reduce congestion and delays at intersections. With GPS data from as little as ...

Alexandria, Virginia, will begin installing smart traffic signals that talk to each other about when to change the lights so drivers can get moving. It’s called adaptive traffic signal technology, and ...

For many motorists, the amber traffic signal is more a challenge than a warning: instead of slowing down, they speed up, trying to beat the light before it changes. It is a hazardous practice, since ...

Researchers are exploring ways to use features in modern cars, such as GPS, to make traffic safer and more efficient. This undated photo provided by the University of Michigan College of Engineering ...