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SESK: Stuff Everyone Should Know · sesk.info/drive-signal-highway-exit

How early should you signal a highway exit?

Many state manuals say signal about five seconds before exiting.

  1. After entering the ramp
  2. About five seconds before ✔
  3. Only while braking

Why: Signal while still in the proper lane so drivers behind can anticipate your move. Stay within lane markings and enter the exit at a safe speed.

Huh, didn't know that: At 55 mph, five seconds covers roughly 400 feet of road.

The dad joke
The exit signal gave five seconds notice because it was very considerate.
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References

Answer: About five seconds before. Signal while still in the proper lane so drivers behind can anticipate your move. Stay within lane markings and enter the exit at a safe speed.

  1. California Driver's Handbook, Exiting www.dmv.ca.gov/portal/handbook/california-driver-handbook/navigating-the-roads
    signal five seconds (approximately 400 feet) before you exit.
    Checked 2026-10-09.

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