Freeway: merging Match the speed, find a gap
Traffic on the freeway has the right-of-way. On the on-ramp, get to or near the speed of the traffic, use your mirrors and your signal, look over your shoulder, and merge into a space big enough for your car. Do not stop unless it is absolutely necessary.
CA Driver's Handbook, "Merging" and "Crossing or Entering Traffic" · CVC 22107 (signal)Who has the right-of-way when you merge onto a freeway in California?
The traffic already on the freeway: "Highway traffic has the right-of-way" (Handbook). Get to or near its speed on the ramp and merge into a gap.
Why this rule exists
A car that joins at the speed of the traffic fits into a gap. A slow or stopped car at the end of the ramp forces the fast traffic behind it to brake.
Step by step on the road
- Use the on-ramp to speed up to, or near, the speed of the freeway traffic.
- Pick your gap early in the mirror: a space big enough for your car to join the lane safely.
- Check your mirrors, signal, and turn your head quickly to look over your shoulder.
- Merge into the gap smoothly, without crossing any solid lines.
- Do not stop on the ramp unless you absolutely must.
- Once you are in, cancel the signal and keep three seconds of space to the vehicle ahead.
Common mistakes
- Coming up the ramp too slowly, so you have to squeeze in among much faster cars.
- Stopping at the end of the ramp when nothing makes you.
- Trusting the mirror alone and missing a car in the blind spot.
- Crossing a solid line to get into the lane sooner.
On the DMV drive test
The regular class C drive test has no freeway part: DL 955 says its freeway criteria are only for supplemental drive tests. Where they are used, the examiner wants your turn signal on as soon as freeway traffic can see it, a merge at the right speed for the traffic and as soon as there is an adequate gap, and no driving over the solid boundary lines. An unnecessary stop in a freeway merge lane is listed as a critical driving error.
Based on the DMV’s Driving Test Criteria (DL 955) and its score sheet (DL 32). How the drive test works ›Questions people ask
How fast should you go when you merge onto a freeway?
At or near the speed of the freeway traffic (Handbook, "Merging"). Use the on-ramp to build up that speed before you move over.
Can you stop at the end of a freeway on-ramp?
Only if it is absolutely necessary (Handbook, "Merging"). A car that stops there has to join fast traffic from a standstill, and the traffic behind it has to brake.
How big a gap do you need to enter a highway?
The Handbook says about a full block, about 300 feet, to enter traffic on the highway: a space large enough for your car to join the lane safely.
Did you know?
- Do not cross over any solid lines when merging.
- To enter traffic on the highway you need a space of about a full block, about 300 feet (Handbook).
- Make sure you can stop safely: leave three seconds of space between you and the vehicle in front of you.
Test yourself
1Who has the right-of-way when you enter a freeway?
- You: you come from the ramp
- The traffic already on the freeway
- Whoever is faster
- Whoever signals first
Show the answer
B: The traffic already on the freeway. Handbook "Merging": "Highway traffic has the right-of-way."
2How fast should you be going when you merge?
- At or near the speed of the traffic
- About 25 mph
- As slow as you can
- Much faster than the traffic
Show the answer
A: At or near the speed of the traffic. Handbook "Merging": be at or near the speed of traffic.
3A gap is coming up on the freeway. Before you move over, you…
- only signal
- stop at the end of the ramp
- look straight ahead only
- use your mirrors and signal, and look over your shoulder
Show the answer
D: use your mirrors and signal, and look over your shoulder. Handbook "Merging": use your mirrors and turn signals, and turn your head quickly to look over your shoulder before merging.
Kees' tip
Use the ramp to build speed and pick your gap early in the mirror. Signal, one quick look over your left shoulder, then steer in smoothly.