That light may never turn green if you don’t stop close enough. This way you can reduce waiting time and avoid annoying drivers behind you.
Current trend
On my side street, the traffic light almost always turns green within 10 seconds of my arrival, which creates a happy atmosphere for the rest of the journey. However, sometimes someone stops too far away or in a queue where the traffic light sensor does not detect them. In such situations, I sometimes have to wait several minutes before someone stops on the other side of the intersection and finally turns on their light.
My frustration seems to be widespread. In discussions on Reddit and other sites, many complain about unsuspecting drivers, while others admit they were unaware of the traffic light sensors.
“Topics like traffic light sensors often feature in the media because they directly impact drivers, particularly due to the myths surrounding their operation,” explains Virginia Lingham, vice president of infrastructure technology company WSP. “Furthermore, the development of intelligent transportation systems and the integration of connected vehicles is creating public curiosity about how these systems work.”
If you’re curious about how traffic light sensors work, or simply want to make sure the traffic lights are always green and create a positive atmosphere, here’s what you need to know.
What are traffic light sensors for?
Traffic light sensors detect when a vehicle stops at a red light and inform the traffic light control system that the vehicle is waiting for a green light. This optimizes the amount of time the light can remain green in the busiest lanes and reduces waiting times at red lights.
Some traffic light sensors combine data from multiple sensors, explains Xavier Sabastian, automotive expert at Way.com. This allows them to:
Improve traffic flow
Reduce engine idling, saving fuel and emissions
Reduce accidents
Adapt to changes in traffic during and outside rush hour
They solve constant bottlenecks by updating traffic light times in real time.
“Some sensors automatically prioritize emergency vehicles passing through an intersection,” explains Sabastian.
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