SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/drive-double-white-lines

Two solid white lines separate your lane from a carpool lane. May you cross them?

No. Double solid white lines are a barrier; wait for a broken line.

  1. Yes, if you signal
  2. No, wait for a broken white line ✔
  3. Yes, whenever traffic is light

Why: Double solid white lines work like a wall you cannot cross. Change lanes only where the line becomes a single broken white line.

Huh, didn't know that: Double solid white lines are also common near freeway on and off ramps.

The dad joke
Why don't double white lines tell secrets? Nobody is allowed to cross them.
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References

Answer: No, wait for a broken white line. Double solid white lines work like a wall you cannot cross. Change lanes only where the line becomes a single broken white line.

  1. California Driver's Handbook, Section 6 Navigating the Roads www.dmv.ca.gov/portal/handbook/california-driver-handbook/navigating-the-roads
    Never change lanes over double solid white lines. Wait until you see a single broken white line.
    Checked 2026-10-09.
  2. California Driver's Handbook, Section 6 Navigating the Roads www.dmv.ca.gov/portal/handbook/california-driver-handbook/navigating-the-roads
    You may also see double solid white lines in or near freeway on and off ramps.
    Checked 2026-10-09.

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