GRAND RAPIDS, Mich. — Drivers in Grand Rapids experienced backups and long delays during the afternoon commute after many of the city's traffic lights lost power. The issue began just before 4 p.m.

A security researcher says he found a flaw in a traffic light controller that would potentially allow malicious hackers to change the lights and create traffic jams. Andrew Lemon, a researcher at ...

Flexible and wear-resistant strands of conductive fibre have been used to make smart clothes with embedded computers and sensors, such as hats that can sense traffic light changes. Previous efforts to ...