Night-Before Checklist: Turns, Merging & Passing Rules

Tomorrow is your California DMV written knowledge test. You have studied. Tonight is not the time to cram everything; it is the time to lock in a few high-value rules. This quick checklist covers turning positions, turns on red, U-turns, freeway entry and exit, and passing restrictions. Read it once, say the rules out loud, and get some sleep.

Turning positions

The core idea is simple: signal 100 feet before you turn, and turn from the lane closest to your direction. On the test, this usually shows up as a question about which lane to use or when to signal.

Signal at least 100 feet before the turn (more than half a city block in town).
Right turns: start from the right lane or the lane closest to the right curb.
Left turns: start from the left lane or the lane closest to the center line.
After turning, steer into the lane that matches your turn, not a random lane.

Worked scenario: You are on a two-lane road and want to turn right. There is a bike lane on the right. The test might ask where you should be before the turn. The safe answer is to signal early, check your mirror and blind spot, and move into the right-most lane or turn lane as allowed, then complete the turn into the first available lane. Never swing wide from the left lane to make a right turn.

Turns on red

A red light does not always mean no turn. In California, you may turn right on red after a full stop unless a sign says otherwise. You may also turn left on red when you are turning from a one-way street onto another one-way street, again unless a sign prohibits it. In both cases, yield to pedestrians, bicyclists, and vehicles that have a green light.

Worked scenario: You are stopped at a red light, turning right. A pedestrian steps into the crosswalk. The correct move is to stay stopped until the crosswalk is clear, then turn when it is safe. The test may phrase this as: “You may turn right on red after stopping, unless a sign prohibits it, and you must yield to pedestrians.”

U-turns

A U-turn is turning around to go back the way you came. Signal, use the left turn lane or the far-left lane, and make sure it is legal and safe. Do not make a U-turn in heavy traffic. Look in all directions before and during the turn; traffic can appear in seconds.

Worked scenario: You are on a quiet residential street and want to go back. The test might ask what to do first. The answer: signal, check for traffic in all directions, and only turn when you can see the way is clear. If a sign says no U-turn, do not do it.

Freeway entry and exit

Merging onto a freeway takes planning. Be in the proper lane on the on-ramp, be at or near the speed of traffic, and merge when safe. Do not stop unless you absolutely must. Use your mirrors and turn signals, and turn your head quickly to check your blind spot before merging. Choose a gap large enough for your vehicle. When exiting, signal early, move into the exit lane, and adjust speed after you are off the main lanes.

Worked scenario: You are on a short on-ramp with traffic moving fast. The test may ask what to do. The answer is to use the ramp to build speed, signal, check your blind spot, and merge into a safe gap. Do not stop at the end of the ramp unless traffic forces you to.

Passing restrictions

Passing is where many test questions hide. You may pass on the right only in limited cases, such as when there are two or more lanes going your direction, or when the driver ahead is turning left and you can safely pass on the right. Never drive off the paved or main-traveled part of the road to pass. Never pass on a curve or hill where you cannot see ahead. Do not pass within 100 feet of an intersection, bridge, tunnel, railroad crossing, or other hazardous area.

Worked scenario: You are behind a slow truck on a two-lane road, approaching a curve. The test may ask if you can pass. The answer is no, because you cannot see if traffic is coming. The same goes for a hill. Wait until you have clear sight distance.

Quick self-check

You want to turn left at an intersection. Where should you start?
A. The right lane
B. The lane closest to the center line
C. Any lane, as long as you signal
Answer: B.
You are stopped at a red light and want to turn right. A pedestrian is waiting to cross. What do you do?
A. Turn before the pedestrian steps off the curb
B. Honk and turn
C. Wait until the pedestrian clears, then turn when safe
Answer: C.
You are on a two-lane road approaching a hill and want to pass. What is the rule?
A. Pass if you signal
B. Do not pass because you cannot see ahead
C. Pass only if the driver ahead waves you on
Answer: B.

Key takeaways

Signal 100 feet before turning and turn from the lane closest to your direction.
Right on red is allowed after a full stop unless a sign says no, and you must yield.
Left on red is allowed only from a one-way street onto a one-way street, unless prohibited.
Merge onto freeways at or near traffic speed and check your blind spot.
Never pass on a curve or hill where you cannot see, and never pass within 100 feet of hazards like intersections or railroad crossings.

When you are ready, practise with Mia at lastdmv.com to build confidence before test day.

Frequently asked questions

Can I turn left on a red light in California?

Yes, but only when you are turning from a one-way street onto another one-way street, and only if no sign prohibits it. You must yield to pedestrians, bicyclists, and vehicles that have a green light.

How far before a turn should I signal?

Signal at least 100 feet before turning, which is more than half a city block in town. Signal earlier on faster roads so other drivers have time to react.

When can I pass on the right?

You may pass on the right only when there are two or more lanes going your direction, or when the driver ahead is turning left and you can safely pass on the right. Never drive off the paved part of the road to pass.

Do I have to stop when merging onto a freeway?

No. Use the on-ramp to get at or near the speed of traffic, signal, check your blind spot, and merge when safe. Do not stop unless it is absolutely necessary.

Night-Before Checklist: Turns, Merging & Passing Rules