Intersections are where traffic from different directions has to share the same small piece of road.
It is no surprise that many crashes happen there.
Most of them come down to one question: who was supposed to go first?
Right-of-way rules answer that question so drivers, bicyclists and pedestrians can move in a predictable order.
This guide walks through the common situations, using the California Driver Handbook as the reference.
Rules are very similar across the country, but details can vary, so check your own state driver handbook too.
The two ideas behind every right-of-way rule
The California Driver Handbook starts with a simple principle.
The vehicle that arrives at the intersection first has the right-of-way.
Everyone else waits for that person to go.
The second idea matters just as much.
The handbook says never to assume that other drivers will give you the right-of-way.
It also tells drivers to give up the right-of-way when doing so will help prevent a collision.
In other words, the rules tell you who should go.
They never make it safe to force your way through.
Stop signs: what a full stop really means
At a stop sign, the handbook says to make a full stop before the crosswalk or at the limit line.
If there is no limit line or crosswalk, stop before entering the intersection.
Then check traffic in all directions before you go.
A full stop means the car stops moving completely. A slow roll is not a stop.
If bushes or parked cars block your view, creep forward slowly after stopping until you can see.
Four-way stops and intersections without signs
The same order applies at intersections with no signs and at intersections with stop signs on every corner.
At an all-way stop, everyone stops first, and then the normal order applies.
- The vehicle that arrives first goes first.
- If two vehicles arrive at the same time, the driver on the left yields to the one on the right.
- Pedestrians and bicyclists who arrive at the same time as you are part of this rule.
The handbook puts it this way: give the right-of-way to the vehicle, pedestrian or bicyclist on your right.
Make your intentions clear.
Use your turn signal and avoid inching forward when it is not your turn.
If another driver waves you on, make sure the way is truly clear before you move.
T intersections
At a T intersection without stop or yield signs, the through road has priority.
The handbook says traffic continuing straight on the through road has the right-of-way.
That includes vehicles, bicyclists and pedestrians.
If you are on the road that ends, wait for a safe gap.
Turning left and turning right
Left turns cross the path of oncoming traffic, so they demand extra care.
The handbook says to check for pedestrians first.
Then give the right-of-way to any pedestrian or approaching vehicle close enough to be dangerous.
Oncoming cars often move faster than they appear. When in doubt, wait for the next gap.
Right turns carry their own risks.
The handbook says to always check for pedestrians crossing the street before turning right.
It also says to check for motorcycles and bicycles riding next to you.
A quick look over your right shoulder catches a cyclist your mirror may miss.
Traffic signals and right-of-way
A green light does not mean the intersection is clear.
The handbook says you should still stop for any vehicle, bicyclist or pedestrian already in the intersection.
Pedestrians have the right-of-way on a green light, too.
Do not enter the intersection if you cannot get completely across before the light turns red.
In California, it is against the law to stop or block an intersection without room to cross.
The handbook's safe driving section adds one more habit.
Look both ways, even when cross traffic has a red light or a stop sign.
A few signals cause regular confusion:
- Flashing red light: stop, then go when it is safe.
- Flashing yellow light: slow down and proceed with caution. You do not need to stop.
- Flashing yellow arrow: you may turn left, but you must yield to oncoming traffic first.
- Red arrow: do not turn. Wait for a green light or a green arrow.
When the traffic light is out
Power outages and storms can knock out traffic signals.
The handbook says to treat a dark signal as if there were stop signs in all directions.
Stop completely, follow the four-way stop order and proceed carefully when it is safe.
Yield signs and entering traffic
A yield sign means slow down and be ready to stop.
Let any vehicle, bicyclist or pedestrian pass before you continue.
The same idea applies whenever you enter traffic, such as pulling out of a driveway or a parking lot.
The handbook says to yield to the traffic already occupying the lanes.
Pedestrians and crosswalks
Pedestrians have the right-of-way in marked and unmarked crosswalks.
Many crosswalks have no painted lines at all, so watch every corner.
If there is a limit line before the crosswalk, stop at the line and let people cross.
The handbook adds several important habits:
- Do not pass a vehicle stopped at a crosswalk. A pedestrian may be hidden in front of it.
- If a pedestrian makes eye contact with you, expect them to cross and yield.
- Give seniors, people with small children and people with disabilities extra time.
- Do not stop in the middle of a crosswalk.
Pedestrians using a guide dog or a white cane have the right-of-way at all times.
The handbook warns not to honk at a blind pedestrian.
It also says quiet hybrid and electric cars call for extra care, because blind pedestrians rely on sound.
Roundabouts
Roundabouts keep traffic moving in one direction around a central island.
The handbook gives these steps:
- Slow down as you approach.
- Yield to all traffic already in the roundabout.
- Enter to the right when the gap is big enough to merge safely.
- Travel counterclockwise. Do not stop or pass inside the circle.
- Signal when you change lanes or exit.
- If you miss your exit, keep going around until you reach it again.
In a roundabout with more than one lane, choose your lane by where you are going.
To turn right, use the right lane and exit from it.
To go straight, either lane works, and you exit in the lane you entered.
To turn left, enter and keep driving until you reach the exit you want.
Narrow mountain roads
On a steep, narrow road, two vehicles sometimes meet where neither can pass.
The handbook says the vehicle facing uphill has the right-of-way.
The downhill driver should back up until the uphill vehicle can pass.
The handbook explains that the downhill vehicle has more control when backing up the hill.
Common right-of-way mistakes
- Rolling through a stop sign instead of stopping completely.
- Assuming the other driver will wait because you arrived first.
- Turning left in front of oncoming traffic that is closer than it looks.
- Turning right without checking for bicycles and pedestrians.
- Entering an intersection that you cannot clear before the light changes.
- Treating a dark traffic signal like a green light.
The bottom line
Right-of-way rules exist to make intersections predictable.
Know who should go first, signal clearly, and never insist on your turn when someone else is about to make a mistake.
Giving way for a few seconds costs nothing and can prevent a serious crash.
Sources and Further Reading
- California DMV: California Driver Handbook, Section 7, Laws and Rules of the Road — supports the right-of-way rules at intersections, four-way stops and T intersections, left and right turns, traffic signal meanings, dark signals, yield signs, pedestrians and crosswalks, roundabouts and mountain roads.
- California DMV: California Driver Handbook, Section 8, Safe Driving — supports the advice to look both ways even at intersections where cross traffic has a red light or stop sign.