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SESK: Stuff Everyone Should Know · sesk.info/drive-blue-service-signs

A blue sign with white symbols for gas, food and lodging is what kind of sign?

A service sign, pointing to motorist services.

  1. Service ✔
  2. Warning
  3. Regulatory

Why: Blue signs point you to services such as gas, food, lodging, rest areas and hospitals. They tell you where help and supplies are.

Huh, didn't know that: Blue is also used for evacuation-route guidance.

The dad joke
Why was the gas station sign blue? It missed all the cars driving by.
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References

Answer: Service. Blue signs point you to services such as gas, food, lodging, rest areas and hospitals. They tell you where help and supplies are.

  1. New York State Driver's Manual, Chapter 4 dmv.ny.gov/new-york-state-drivers-manual-and-practice-tests/chapter-4-traffic-control
    SERVICE SIGNS are blue with white letters and symbols.
    Checked 2026-10-09.
  2. MUTCD 11th Edition with Revision 1, Section 1D.05 mutcd.fhwa.dot.gov/pdfs/11th_Editionr1/mutcd11theditionr1hl.pdf
    Blue: road-user services guidance, tourist information, and evacuation route
    Checked 2026-10-09.

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