If there is a green arrow, it is always on the bottom. When the lights are horizontal, red is always on the left. Red light Stop before the intersection or crosswalk and remain standing until green is shown alone. Yellow light When shown alone, traffic should stop before entering the intersection or crosswalk, unless the vehicle is so close to the intersection that it cannot be stopped safely. A yellow arrow means the signal is changing from green to red, and gives the driver a chance to stop safely.
Green light Go if the intersection is clear.
Yield to pedestrians and vehicles still in the intersection and when you turn left or right. Before you make a left turn, yield to vehicles going straight. Green arrow When shown alone or in combination with the red signal, proceed only as shown by the arrow. Be cautious and yield to people on foot. Flashing yellow light Slow down and proceed with care.