Wash. Rev. Code » Title 46 · Chapter 46.37
Revised Code of Washington

Wash. Rev. Code § 46.37.215 (2026)

Hazard warning lamps

✓ current as of May 2026
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(1) Any vehicle may be equipped with lamps for the purpose of warning other operators of other vehicles of the presence of a vehicular traffic hazard requiring the exercise of unusual care in approaching, overtaking, or passing.
(2) After June 1, 1978, every motor home, bus, truck, truck tractor, trailer, semitrailer, or pole trailer eighty inches or more in overall width or thirty feet or more in overall length shall be equipped with lamps meeting the requirements of this section.
(3) Vehicular hazard warning signal lamps used to display such warning to the front shall be mounted at the same level and as widely spaced laterally as practicable, and shall display simultaneously flashing amber light: PROVIDED, That on any vehicle manufactured prior to January 1, 1969, the lamps showing to the front may display simultaneously flashing white or amber lights, or any shade of color between white and amber. The lamps used to display such warning to the rear shall be mounted at the same level and as widely spaced laterally as practicable, and shall show simultaneously flashing amber or red lights, or any shade of color between amber and red. These warning lights shall be visible from a distance of not less than five hundred feet in normal sunlight.
[ 1977 ex.s. c 355 s 19.]

Notes:

Severability—1977 ex.s. c 355: See note following RCW 46.37.010.
Notes of Decisions
Cited in 4 cases, 1996–2001 · leading case: Mathis v. Ammons, 928 P.2d 431 (Wash. Ct. App. 1996).
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Mathis v. Ammons, 928 P.2d 431 (Wash. Ct. App. 1996). · cites it 6× “160(1) provides: Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1970, shall be equipped with vehicular hazard warning lights of the type described in RCW 46.37.215 visible from a distance of…”
Mathis v. Ammons, 928 P.2d 431 (Wash. Ct. App. 1997). · cites it 6× “160(1) provides: Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1970, shall be equipped with vehicular hazard warning lights of the type described in RCW 46.37.215 visible from a distance of…”
State v. Vrieling, 144 Wash. 2d 489 (Wash. 2001). “090(1) (additional equipment required); RCW 46.37.215(2) (hazard warning lamps); RCW 46.”
State v. Vrieling, 28 P.3d 762 (Wash. 2001). “090(1) (additional equipment required); RCW 46.37.215(2) (hazard warning lamps); RCW 46.”
— Wash. Rev. Code § 46.37.215(2) — 2 cases
State v. Vrieling, 144 Wash. 2d 489 (Wash. 2001). “090(1) (additional equipment required); RCW 46.37.215(2) (hazard warning lamps); RCW 46.”
State v. Vrieling, 28 P.3d 762 (Wash. 2001). “090(1) (additional equipment required); RCW 46.37.215(2) (hazard warning lamps); RCW 46.”
— Wash. Rev. Code § 46.37.215(3) — 2 cases
Mathis v. Ammons, 928 P.2d 431 (Wash. Ct. App. 1996). “160(1) provides: Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1970, shall be equipped with vehicular hazard warning lights of the type described in RCW 46.37.215 visible from a distance of…”
Mathis v. Ammons, 928 P.2d 431 (Wash. Ct. App. 1997). “160(1) provides: Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1970, shall be equipped with vehicular hazard warning lights of the type described in RCW 46.37.215 visible from a distance of…”
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