Seattle/ Transportation & Infrastructure

Arlington Sets Adult-Supervision Rules for Kids Under 11, Cracks Down on Centennial Trail Speeders

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Published on October 13, 2026
Arlington Sets Adult-Supervision Rules for Kids Under 11, Cracks Down on Centennial Trail SpeedersSource: Joe Mabel / Wikimedia Commons

Arlington kids under 11 can ride an e-bike with direct supervision from an adult age 18 or older, and every rider under 16 now has to strap on a helmet before rolling through the city's streets and parks. The Arlington City Council passed the rules this past Monday, October 5, creating a brand-new chapter of city law aimed squarely at the e-bike and scooter boom that's been reshaping how people get around Snohomish County.

The council's vote established Ordinance 2026-023, which creates Chapter 10.86 of the Arlington Municipal Code to regulate electric-assisted bicycles, micromobility devices, and powered personal transporters, according to the City of Arlington. Mayor Don Vanney pushed the measure in response to rising e-bike usage across the community, the city says. As reported by KIRO 7 News, Arlington now joins other Snohomish County cities with active micromobility guidelines, and the new policy mirrors regulations Everett adopted back in July.

Who Can Ride What, and Where

The ordinance sorts rules by e-bike classification. Per KIRO 7's reporting, Class 3 e-bikes — the faster category — remain allowed on city roadways and in bike lanes but are barred from parks, sidewalks, and shared-use paths, while Class 1 and Class 2 e-bikes are authorized on those shared-use paths, with riders required to slow down in crowded areas or when approaching pedestrians.

Age restrictions layer on top of those classification rules. HeraldNet reports that Arlington's ordinance prohibits children under 16 from operating Class 3 e-bikes at all, bars kids under 11 from riding any e-bike without adult supervision, and requires every rider under 16 to wear a helmet on e-bikes and electric scooters. The youth provisions set age and helmet requirements for young riders.

Matching the Centennial Trail's Existing Rules

Arlington's code also explicitly bars Class 3 e-bikes and high-speed personal transporters from shared-use paths, aligning the city with Snohomish County trail rules that already prohibit Class 3 e-bikes on the 30-mile Centennial Trail running through town, per HeraldNet's coverage. The restrictions are intended to reduce conflicts between riders and pedestrians.

Arlington's move traces back to a bigger statutory shift. Washington's Engrossed Substitute Senate Bill 6110 took effect in June, amending state law to clarify that any device capable of exceeding 20 mph on electric motor power alone no longer counts as an e-bike — it may instead fall under existing motorcycle or moped categories, depending on the device, according to the Municipal Research and Services Center. That change closed a loophole that had let high-powered “e-motos” operate under bicycle rules. Hoodline covered the upcoming statewide shift in a June 5 article, before it took effect on June 11.

The Injury Numbers Behind the Push

City records cited helmet habits as a central concern. State traffic safety data in Arlington's council agenda bill showed riders involved in Washington e-bike and e-scooter injuries between 2020 and 2024 wore helmets only 30% of the time, a figure city officials used to justify the new helmet mandate.

Regional numbers paint a similar picture. The Everett Fire Department responded to 49 electric device injury calls over a 12-month period, with Everett ranking fifth statewide for e-bike hospitalizations and third for e-scooter hospitalizations, city officials reported in July. Everett had updated its own rules after entering a two-year e-scooter rental agreement with Lime in 2025. Statewide, roughly 149 people were hospitalized due to e-bike injuries in 2025.

The surge in injuries tracks a broader sales boom. U.S. annual e-bike sales expanded nearly fourfold, from approximately 325,000 in 2018 to over 1.1 million in 2022, according to Arlington's council agenda bill — a trend that's put far more affordable, high-speed e-mobility options in the hands of commuters and teenagers alike.

More Rules Likely Coming

Washington's 2026 e-bike legislation didn't stop with classification changes. It also established a state-level work group tasked with studying additional e-mobility regulations and submitting formal recommendations by December 15, 2026, including potential youth driver licensing, age limits, and manufacturing standards, per Velosurance.

The stakes of the broader safety conversation were underscored this month when a 44-year-old man died after falling from an e-bike near 10th and Alder in neighboring Marysville, a case Hoodline reported on. Washington recorded 12 bicyclist fatalities statewide in both 2024 and 2025, down from 17 deaths in 2023, even as preliminary total traffic fatalities in 2025 fell 10.5% from 2024.

Seattle-Transportation & Infrastructure