A go sign tells you it is safe to proceed in the direction the sign indicates
A go sign is a traffic control device that gives you permission to move forward. The most common go sign is the green traffic light, which tells you to proceed through an intersection. Go signs can also appear as green arrows on traffic signals, which tell you it is safe to turn in that direction. Some intersections use green pedestrian walk signals, which tell people on foot it is safe to cross.
When you see a go sign, you are not required to move when ready. Instead, you have the right to proceed — but you must still check that the intersection is actually clear before you move. A green light does not mean other traffic has stopped; it means you have the legal right to go. Your responsibility is to make sure no vehicle or pedestrian is in your path before you accelerate.
Key Takeaways
- A green traffic light or green arrow gives you the right to proceed, but you must still verify the intersection is clear before moving.
- Green lights do not override your duty to avoid collisions — if another vehicle runs a red light, you are still responsible for not hitting them if you can avoid it.
- A green arrow means you have an exclusive right to turn in that direction, and oncoming traffic will be stopped.
- Pedestrians have a walk signal (usually a white walking figure) that corresponds to a green light for vehicles turning across their path, so check for crossing pedestrians even when your light is green.
How green lights and green arrows work at intersections
A standard green traffic light means you may proceed straight through the intersection if it is safe to do so. The light does not may provide that the intersection is empty — it only means your direction of travel has the right of way. Vehicles coming from other directions will see a red light, but mechanical or human failure can cause them to enter the intersection anyway. You must look both ways before proceeding, even at a green light.
A green arrow is different. It appears as a separate signal, usually above or beside the main traffic light, and points in the direction you are allowed to turn. When a green arrow is lit, oncoming traffic is stopped by a red light, which means you have an exclusive right to turn. You do not need to yield to oncoming vehicles. However, you still must watch for pedestrians who may be crossing in front of your turn.
Your legal responsibility when you have a green light
Having a green light gives you the right to proceed, but it does not remove your duty to drive safely. Traffic laws in all states require drivers to avoid collisions whenever possible, even if another driver is breaking the law. If another vehicle runs a red light and you hit them while you have a green light, you may not be at fault — but you are still responsible for trying to avoid the crash if you can.
This means you should approach every green light with caution. Slow down as you enter the intersection, scan for red-light runners, and be ready to stop if you see a vehicle approaching from a side street. Distracted driving — looking at your phone, adjusting the radio, or looking away from the road — makes it much harder to spot danger in time. A green light is your signal to go, not your signal to stop paying attention.
Green pedestrian walk signals and what they mean for drivers
When you see a green light for your direction of travel, pedestrians crossing in front of you will see a walk signal — usually a white walking figure on a pedestrian signal box. This means pedestrians have the right to cross, and you must not turn across their path without yielding to them first. Even though your light is green, you cannot proceed with a left or right turn if a pedestrian is in the crosswalk.
Many collisions happen at intersections where a driver with a green light turns across a pedestrian with a walk signal. The driver assumes the green light means they can turn, but pedestrians have equal right to the crosswalk during their walk signal. Before you turn on a green light, look at the pedestrian signals and the crosswalks. If pedestrians are crossing or about to cross, wait until they have cleared the intersection before you turn.
What to do if you are unsure whether to proceed at a green light
If you approach a green light but something does not feel safe — heavy traffic, poor visibility, pedestrians in the intersection, or a vehicle approaching from a side street — you have the right to wait. Proceeding on a green light is a right, not a requirement. If you are uncomfortable, stay stopped until you are certain the intersection is clear. Other drivers behind you may be frustrated, but your safety is more important than keeping traffic moving.
If you are turning on a green light and you see a pedestrian in the crosswalk, do not proceed. Yield to the pedestrian, even if your light is green and theirs is not. The pedestrian may be crossing illegally, but hitting them is worse than waiting a few seconds. Once the pedestrian has crossed, you can complete your turn.
Differences between a green light and a green arrow
| Signal Type | What It Means | Your Responsibility |
|---|---|---|
| Green traffic light (straight) | You may proceed straight if the intersection is clear | Yield to pedestrians and oncoming traffic; check for red-light runners |
| Green arrow (turn) | You have exclusive right to turn in that direction; oncoming traffic is stopped | Yield to pedestrians crossing in front of your turn; no need to yield to oncoming vehicles |
| Green pedestrian walk signal | Pedestrians have the right to cross in the marked crosswalk | Do not turn across pedestrians; wait until they have cleared |
Common mistakes drivers make at green lights
One of the most common mistakes is assuming a green light means the intersection is clear. Drivers sometimes accelerate through a green light without looking, especially if they are familiar with the intersection. This is dangerous because conditions change. A pedestrian may step into the crosswalk, a vehicle may run a red light, or a cyclist may be in your path. Every green light requires a fresh check of the intersection.
Another mistake is turning on a green light without yielding to pedestrians. Many drivers believe that a green light gives them the right to turn when ready, but pedestrians with a walk signal have equal right to the crosswalk. Turning across a pedestrian is illegal and dangerous, even if your light is green. Always look at the pedestrian signals and the crosswalks before you turn.
A third mistake is not recognizing the difference between a green light and a green arrow. Some drivers treat a green arrow as if it were a regular green light and yield to oncoming traffic unnecessarily. A green arrow means oncoming traffic is stopped, so you do not need to yield to them. However, you still must yield to pedestrians crossing in front of your turn.
Frequently Asked Questions
Can I get a ticket for running a green light?
Yes. If you proceed on a green light but hit a pedestrian or another vehicle, you can be cited for failing to yield or for unsafe driving. A green light does not protect you if you cause a collision. You must still drive defensively and avoid crashes whenever possible.
What if I am turning left on a green light and an oncoming car is coming?
If you have a regular green light (not a green arrow), you must yield to oncoming traffic before turning left. Oncoming traffic also has a green light for their direction. Wait until oncoming vehicles have passed, then turn. If you have a green left-turn arrow, oncoming traffic is stopped, and you can turn without yielding.
Do I have to go when the light turns green?
No. A green light gives you the right to proceed, but you are not required to go. If you do not feel safe, if pedestrians are in the crosswalk, or if traffic is too heavy, you can wait. Proceed only when you are certain the intersection is clear and safe.
What should I do if I am in the intersection when the light turns red?
If you entered the intersection on a green light and the light turns red while you are still in it, continue through the intersection to clear it. Do not stop in the middle of the intersection. Once you have cleared it, proceed to the next block. You have not broken the law because you entered on a green light.
Are green lights the same in every state?
Yes. Green traffic lights mean the same thing in every state and country that uses standard traffic signals. A green light gives you the right to proceed if it is safe. The rules about yielding to pedestrians and oncoming traffic are also the same across all states.