Urban mobility problems demand clarity. Intersections remain the most common sites for crashes, congestion, and violations.

The concept of the traffic light actually dates all the way back to the 1860s, where gas-lit signals were placed on the posh streets that lined the Houses of Parliament in London. Of course, back then ...

If robotaxis and driverless cars get more popular, we may need to adjust existing infrastructure. One such adjustment is ...

Murrysville officials have had problems in recent years with crashes on Route 22 causing damage to the electrical boxes that control several traffic lights along the highway. The municipality plans to ...