Finland To Introduce 'Green Wave' Automated System For Emergency Vehicles
1 64alternative_right writes: Fintraffic's national traffic priority system, which is set to be introduced this summer, will recognize the location of an emergency vehicle and automatically change the lights to green to facilitate its passage.
(Why isn't everyone doing this already?)
1 comments
Re: Is anyone already doing this? (Score: 5, Informative)
by stevenm86 ( 780116 ) on Monday February 02, 2026 @08:49PM (#65965566)
Yes exactly. It's called the 3M Opticom system for traffic light preemption. A while back, there was a market for homebrew transmitters which quickly became criminalized. Some cities are transitioning to GPS-based preemption (centrally coordinated) but the IR-based system is still very common. It's also used by buses to extend the duration of the green phase (low priority preemption) without changing an existing red, like the high priority signal would.