Today I learned that the earliest designs for #trafficLights used a single bulb for each phase. The same bulb shone through a green lens on the main street and, at the same time, through a red lens on the cross street.
Today I learned that the earliest designs for #trafficLights used a single bulb for each phase. The same bulb shone through a green lens on the main street and, at the same time, through a red lens on the cross street.

We've all seen the videos. Busy urban junctions during peak times. Large numbers of cyclists sailing through red lights while pedestrians cross on green and other traffic waits. The footage is clear. It's infuriating.
Very interesting blog about #opentraffic, with link to #opentrafficmap and a presentation:
In German:
https://blog.meister-security.de/opentrafficmap/
#privacy #security #traffic #cars #trafficlights #velocity #speed #location #ESP32