Road tractor.

RCW 46.04.490
in effect
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"Road tractor" includes every motor vehicle designed and used primarily as a road building vehicle in drawing road building machinery and devices. "Road tractor" includes every motor vehicle designed and used primarily as a road building vehicle in drawing road building machinery and devices.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=46.04&full=trueFetched: 6/29/2026

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