Those traffic loop sensors embedded at stop lights to detect the presence of a car have always provided fodder for vehicular snake oil vendors: I’ve seen products promising to eliminate red lights ...

A traffic signal sensor in Portland. Welcome to our newest column: Bike Science with Shawn Small One of the more frustrating aspects of cycling in an urban environment is not being able to trigger a ...

If you're a regular bicycle commuter, then you've no doubt experienced the following scenario: you're the only vehicle going in your direction at a controlled intersection, and the light is red, but ...