Timeline for Traffic lights: why yellow before green?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 27, 2021 at 19:24 | comment | added | Liggliluff | Timers only work for when traffic is heavy enough for the full time to run out. But if there are no cars on the road, it will turn red earlier, and the next road will therefore have to turn green before the timer runs down. Then a road can skip the queue and get green earlier to let emergency vehicles and busses through quicker. | |
| Jan 30, 2015 at 1:54 | comment | added | Heng-Cheong Leong | In Singapore, the local authorities specifically chose not to implement this. The reason is to allow variable length of green-light. For example, if sensors detected an ambulance approaching, the lights will change to minimize the ambulance's waiting time. | |
| Jan 28, 2015 at 23:50 | comment | added | CodeCharming | You guys don't have this in most European countries? I thought that's where we got the idea from. | |
| Jan 5, 2012 at 22:23 | comment | added | finnw | Also Bulgaria has some counters like this. | |
| Jan 2, 2012 at 10:51 | history | edited | FrankL | CC BY-SA 3.0 |
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| Jan 2, 2012 at 10:32 | history | answered | FrankL | CC BY-SA 3.0 |