Basic Traffic Signal

	Green light A green light means you may turn left, go straight or turn right after yielding to vehicles and pedestrians already in the intersection. When turning left or right you must yield the right-of-way to pedestrians crossing the intersection.
	Yellow light A yellow — or amber — light means the red light is about to appear. You must stop if you can do so safely; otherwise, go with caution.
	Red light A red light means you must stop. Bring your vehicle to a complete stop at the stop line if it is marked on the pavement. If there is no stop line, stop at the crosswalk, marked or not. If there is no crosswalk, stop at the edge of the sidewalk. If there is no sidewalk, stop at the edge of the intersection.
	Lights and arrows to help turning vehicles Flashing green lights and green arrows direct drivers who are turning.
	Advance green light or arrow When you face a flashing green light or a left-pointing green arrow and a green light, you may turn left, go straight ahead or turn right from the proper lane. This is called an advanced green light because oncoming traffic still faces a red light. Pedestrians must not cross on a flashing green light unless a pedestrian signal tells them to.
	Simultaneous left turn When a left-turn green arrow is shown with a red light, you may turn left from the left-turn lane. Vehicles turning left from the opposite direction may also be making left turns because they too face a left-turn green arrow.
	Simultaneous left turn After the left-turn green arrow, a yellow arrow may appear. This means the green light is about to appear for traffic in both directions. Do not start your left turn. Stop if you can do so safely; otherwise, complete your turn with caution.
	Simultaneous left turn You can still turn left when the light is green, but only when the way is clear of traffic and pedestrians. If the light turns red when you are in the intersection, complete your turn when it is safe.
	Transit Priority Signals Traffic and pedestrians must yield to public transit vehicles at a transit priority signal. The round signal is on top of a regular traffic signal and shows a white vertical bar on a dark background. This allows transit vehicles to go through, turn right or left, while all conflicting traffic faces a red light.
	Fully protected left turn Some intersections have separate traffic lights for left-turning traffic and for traffic going through the intersection or turning right.
	Fully protected left turn When a left-turn green arrow appears for traffic in the left-turn lane, traffic going straight ahead or turning right will usually see a red light. You may turn left from the left-turn lane when you face a green arrow. Vehicles from the opposite direction may also be turning left.
	Flashing red light You must come to a complete stop at a flashing red light. Move through the intersection only when it is safe.
	Flashing yellow light A flashing yellow light means you should drive with caution when approaching and moving through the intersection.
	Blank traffic lights During an electrical power loss, traffic lights at intersections will not work. Yield the right-of-way to vehicles in the intersection and to vehicles entering the intersection from your right. Go cautiously and use the intersection the same way you would use an intersection with all-way stop signs.
	Flashing red beacon A flashing red beacon above an intersection or stop sign means you must come to a complete stop. Move through the intersection only when it is safe to do so.
	Flashing yellow beacon A flashing yellow beacon above an intersection, above a warning sign or on an obstruction in the road, warns you to drive with caution.