This traffic light regulates that:

- ATraffic turning to the right may filter if the road is clear
- BTraffic turning to the left may filter if the road is clear
- CTraffic going straight may proceed if road is clear
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Answer: Traffic turning to the left may filter if the road is clear
The red and amber lamps are dark and the bottom lamp shows a green arrow pointing left. An arrow releases only the movement it points to, so traffic turning left may filter when the road is clear. Anyone going straight on or turning right waits for the full green.






