TIL Los Angeles is the first major city in the world to synchronize all its traffic lights. Nearly 4,400 lights across 469 miles receive real-time updates about traffic flow to make second-by-second adjustments. The system limits congestion by up to 16% while also dramatically reducing idling time.

[u/WhileFalseRepeat]

https://www.zdnet.com/article/los-angeles-synchronizes-all-traffic-lights/

[u/Aksurah]

Wait, I thought this was standard. Why would all of the lights everywhere not be synchronized?