AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/cdl-four-way-flashers-stopped

When should you use four-way flashers on a commercial vehicle?

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  1. Only while passing another vehicle
  2. When parked at the side of the road
  3. Only at night

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References

  1. California Commercial Driver Handbook (AAMVA model manual) www.dmv.ca.gov/portal/file/california-commercial-driver-handbook-pdf Checked 2026-10-10.

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