When can vehicles enter the left-turn waiting area?

[NaomiRose]

Conditions for vehicles to enter the left-turn waiting area: 1. When both the straight and left-turn signals are red, left-turning vehicles are prohibited from entering the waiting area and should queue behind the stop line to wait for permission to proceed. 2. When the straight signal in the same direction turns green (while the left-turn signal remains red), left-turning vehicles should enter the waiting area in order and wait to turn left. When the left-turn signal subsequently turns green, vehicles waiting in the waiting area should turn left through the intersection in sequence. 3. When the left-turn signal is red (or yellow), left-turning vehicles that have not yet entered the waiting area should stop behind the stop line and wait, and must not enter the waiting area. Left-turning vehicles that have already entered the waiting area should continue to turn left through the intersection and must not stop within the intersection, maintaining smooth traffic flow.