{"data":{"id":"us-wa/rcw-46.37.351","jurisdiction":"us-wa","citation":"RCW 46.37.351","heading":"Performance ability of brakes.","body":"Every motor vehicle and combination of vehicles, at all times and under all conditions of loading, upon application of the service brakes, shall be capable of:\n(1) Developing a braking force that is not less than the percentage of its gross weight tabulated herein for its classification,\n(2) Decelerating to a stop from not more than twenty miles per hour at not less than the feet per second per second tabulated herein for its classification, and\n(3) Stopping from a speed of twenty miles per hour in not more than the distance tabulated herein for its classification, such distance to be measured from the point at which movement of the service brake pedal or control begins.\nTests for deceleration and stopping distance shall be made on a substantially level (not to exceed plus or minus one percent grade), dry, smooth, hard surface that is free from loose material.\nClassification\nof vehicles\nBraking\nforce\nas a\npercent-\nage of gross\nvehicle or\ncombination\nweight\nDeceler-\nation in\nfeet per\nsecond\nper\nsecond\nBrake\nsystem\napplication\nand\nbraking\ndistance\nin feet\nfrom an\ninitial\nspeed of\n20 m.p.h.\nA\nPassenger vehicles with\na seating capacity of\n10 people or less\nincluding driver, not\nhaving a manufacturer's\ngross vehicle weight\nrating . . . .\n52.8%\n17\n25\nB-1\nAll motorcycles and\nmotor-driven cycles . . . .\n43.5%\n14\n30\nB-2\nSingle unit vehicles\nwith a manufacturer's\ngross vehicle weight\nrating of 10,000\npounds or less . . . .\n43.5%\n14\n30\nC-1\nSingle unit vehicles\nwith a manufacturer's\ngross weight rating of\nmore than 10,000\npounds . . . .\n43.5%\n14\n40\nC-2\nCombinations of a\ntwo-axle towing vehicle\nand a trailer with a\ngross trailer weight of\n3,000 pounds or less . . . .\n43.5%\n14\n40\nC-3\nBuses, regardless of the\nnumber of axles, not\nhaving a manufacturer's\ngross weight rating . . . .\n43.5%\n14\n40\nC-4\nAll combinations of\nvehicles in driveaway-\ntowaway operations . . . .\n43.5%\n14\n40\nD\nAll other vehicles and\ncombinations of\nvehicles . . . .\n43.5%\n14\n50","path":["Title 46","Chapter 46.37"],"source_url":"https://app.leg.wa.gov/rcw/default.aspx?cite=46.37.351","current_through":"July 15, 2026","vintage":"","retrieved_at":"2026-09-06T03:04:57Z","sha256":"bc91c78069bec8b615a102ef13f4bc7004297cdce1bad7bcf2b014f53fac8e30","source_id":"us-wa","stale":false,"prev":"us-wa/rcw-46.37.340","next":"us-wa/rcw-46.37.360"},"notice":"GroundRules: Original legal text. Not legal advice."}