San Mateo County Advances E-Bike Rules With 5 MPH Sidewalk Limit and Fines

Last Updated on August 12, 2026 by Kristina

REDWOOD CITY, California – August 12, 2026: San Mateo County supervisors have advanced a new set of rules for e-bikes and other electric micromobility devices, including a 5 mph sidewalk speed limit, escalating fines, restrictions on unsafe riding and new enforcement tools for devices that are effectively illegal electric motorcycles.

The San Mateo County Board of Supervisors approved the introduction of the ordinance on August 11. County records list the measure as passed, and local reporting says the vote was unanimous. A second reading is still expected before the adoption process is complete, so the proposed new rules are not yet in effect. Riders can compare the proposal with California’s broader requirements in the State-by-State E-Bike Law Guide. The ordinance currently states that it would take effect January 1, 2027 if the adoption process is completed.

The rules would apply directly in unincorporated San Mateo County, not automatically inside every incorporated city in the county. County officials have described the measure as a model that cities could adopt or modify for their own communities. Readers can also follow the latest Electric Bike News coverage as the ordinance develops.

Current Status: Ordinance Introduced and Advanced

The August 11 agenda formally described the action as the “introduction” of an ordinance amending Chapter 7.80 of the San Mateo County Ordinance Code to regulate “Electric Micromobility Devices.”

County records show the measure passed at that stage, while local reporting says supervisors voted unanimously and directed staff to bring the ordinance back for a second reading.

That distinction matters. San Mateo County has advanced the ordinance, but riders should not treat the proposed local requirements as enforceable law yet.

The proposed ordinance lists an effective date of January 1, 2027, assuming the remaining adoption process is completed.

What the San Mateo County E-Bike Rules Would Do

Although e-bikes are a major focus, the ordinance is broader than conventional Class 1, Class 2 and Class 3 electric bicycles.

It defines “E-Micromobility Devices” to include legal electric bicycles, electric skateboards, motorized bicycles and motorized scooters. It separately uses the term “Illegal Motorcycle” for certain electric vehicles that resemble bicycles or motorcycles but do not qualify for legal operation under California vehicle laws.

5 MPH Limit on Sidewalks

Where riding an electric micromobility device on a sidewalk is otherwise permitted, the proposed ordinance would require riders to:

• Yield to pedestrians and take reasonable care to avoid collisions.
• Give an audible warning before overtaking or passing someone.
• Travel no faster than 5 mph.
• Slow to walking speed or dismount when passing someone or when close enough to create a hazard.

The ordinance does not create a blanket right to ride an e-bike on every sidewalk. The 5 mph rule applies where sidewalk riding is not already prohibited.

Unsafe Riding, Passengers and Wheelies

The ordinance would also prohibit operating an e-micromobility device or illegal motorcycle in a manner that creates a danger to the rider, passengers, motorists, other riders, pedestrians or property.

The proposed language gives several examples. Those include carrying a passenger on a device not designed for passengers, carrying something that interferes with control or visibility, and performing dangerous acrobatics, tricks, wheelies or stunts when they create a serious risk of injury, death or property damage.

This section is aimed at riding behavior rather than simply the label attached to the vehicle.

The Ordinance Also Targets Illegal E-Motos

One of the more important parts of the proposal is its attempt to address powerful electric motorcycles and other devices that may look like e-bikes but do not legally qualify as electric bicycles.

California law defines electric bicycles under a three-class system. State officials have warned that vehicles capable of providing throttle assistance beyond 20 mph or pedal assistance beyond 28 mph, exceeding applicable power limits or lacking operable pedals may fall outside the legal e-bike definition and instead be subject to motorcycle or moped requirements.

San Mateo County’s ordinance defines certain noncompliant devices as “Illegal Motorcycles” and expressly distinguishes legal Class 1, Class 2 and Class 3 e-bikes from that category.

The ordinance would prohibit illegal motorcycles from being operated on public streets, public rights-of-way and other public places where they are not legally permitted.

Fines Could Rise From $50 to $500

Violations of the new local provisions could result in an infraction or an administrative citation.

The proposed administrative fines are:

• Up to $50 for a first violation.
• Up to $200 for a second violation occurring within one year of the first.
• Up to $500 for each additional violation within one year of the first.

The ordinance also establishes an appeals process and allows financial hardship to be considered when an administrative fine is reviewed.

Minors Could Take a Safety Course Instead of Paying a First Fine

For younger riders, the ordinance includes an education option.

A minor receiving a first qualifying citation within a 12-month period could be permitted to complete a traffic safety education program instead of paying the fine. The County Executive’s Office and Sheriff’s Office are developing that program.

If the minor does not complete the assigned program, the fine could then be imposed.

The ordinance would also allow an officer to impound a minor’s electric micromobility device or illegal motorcycle following a qualifying citation or arrest. An impounded device would have to be released to a responsible adult.

Parking and Serial Numbers Are Included Too

The proposed rules would prohibit leaving an e-micromobility device or illegal motorcycle where it blocks the pedestrian portion of a sidewalk or pedestrian path.

They would also prohibit removing, destroying, mutilating or otherwise altering a manufacturer’s serial number or other permanent identifying number on the frame.

The Rules Would Apply Only to Unincorporated San Mateo County

This is another important limitation.

The county ordinance would be enforceable within unincorporated San Mateo County. Cities such as Burlingame, San Mateo, Redwood City and others have their own governmental authority and may have different rules.

County officials have been working toward a model ordinance partly because local governments and law enforcement agencies have asked for more consistent rules around e-bikes, high-powered electric motorcycles and other micromobility devices.

San Mateo County has 20 incorporated cities, and the county has expressed interest in creating a framework that cities could choose to adopt or adapt rather than automatically imposing one county rule inside those jurisdictions.

The County Has Been Working on E-Bike Rules for Months

The August vote was not the beginning of San Mateo County’s e-bike policy discussion.

Supervisors Jackie Speier and Ray Mueller publicly pushed for a coordinated approach earlier in 2026, and a February forum brought together county officials, law enforcement, medical professionals and safety advocates to discuss growing concerns about powerful electric vehicles and confusion over the difference between legal e-bikes and electric motorcycles.

An earlier version of the ordinance came before supervisors in March but did not move forward at that time. Officials later revised the proposal following additional outreach and a May 5 study session.

County materials say emergency-department visits associated with e-bikes have increased particularly among riders ages 10 to 19 and have risen faster than conventional bicycle-related visits since 2021.

Those discussions and earlier policy work are important context. The current ordinance is the product of a broader county effort to address e-bike and electric-motorcycle safety, rather than a measure created solely in response to one crash.

Ayden Fang’s Death Became Part of the Broader Safety Debate

The August 11 discussion also returned to the death of 4-year-old Ayden Fang, who was killed in Burlingame on August 8, 2025.

An 11-year-old boy riding an e-bike with his 10-year-old sister collided with a car exiting a parking lot. Burlingame police later said the e-bike rider had the right-of-way and, based on their investigation, was following state and local laws.

After the initial collision, the car suddenly accelerated onto the sidewalk and struck Ayden before crashing into a restaurant. Ayden died at the scene.

That sequence is important because describing the incident simply as an “e-bike crash that killed a 4-year-old” could leave readers with the mistaken impression that the child riding the e-bike directly struck or was found responsible for Ayden’s death.

The incident later became the subject of a wrongful-death lawsuit, which Electric Bike Explorer covered in its report on the Burlingame chain-reaction crash.

Ayden’s father spoke at the August 11 meeting in support of stronger safety measures. Supervisor Lisa Gauthier proposed naming the ordinance in Ayden’s memory, and staff was directed to work on that change before the second reading.

Ayden’s death has become part of the broader local discussion about e-bike and roadway safety, but San Mateo County’s work on electric micromobility regulation also includes earlier forums, policy proposals, injury data and discussions about high-powered electric motorcycles.

What Riders Should Know Right Now

Nothing in the August 11 action means San Mateo County riders suddenly face a new 5 mph sidewalk limit today.

The measure still needs to complete the county’s ordinance-adoption process. If it is finally adopted in its current form, the ordinance says it will take effect January 1, 2027.

Riders should also remember that California already regulates legal e-bike classes, equipment, helmet requirements and where different types of electric vehicles may be operated.

The new county ordinance is designed partly to reinforce those rules and partly to create additional local enforcement tools for unsafe riding, sidewalk behavior and vehicles that do not qualify as legal e-bikes.

My Take

I think the most useful part of this ordinance is that it tries to separate legal e-bikes from high-powered electric motorcycles that are often casually called e-bikes. That distinction matters for both safety and fair enforcement.

Riders using a normal, legal Class 1, 2 or 3 e-bike should not automatically be treated the same as someone operating an unregistered electric motorcycle on a sidewalk.

The 5 mph sidewalk rule is also straightforward enough for riders to understand, but enforcement and public education will matter. A rule that applies only in unincorporated areas can still become confusing when a rider crosses from one city or jurisdiction into another.

That is why the county’s model-ordinance approach could ultimately be more important than this first vote. If nearby cities adopt compatible rules, riders, parents and law enforcement may have a clearer idea of what is expected throughout the Peninsula.

For now, though, this remains an ordinance that has advanced at the introduction stage, not a new rule that riders should assume is already in force.

📰 How This Story Was Verified

This report is based on San Mateo County’s August 11 Board of Supervisors agenda, the official ordinance text and board memorandum, prior county statements about the proposed e-bike rules, California Department of Justice guidance on e-bike classifications and reliable local reporting on the August 11 vote and the Burlingame crash.

I have distinguished the ordinance’s introduction and initial approval from final adoption, and I have not described the proposed January 1, 2027 requirements as current law.

Sources

• San Mateo County Board of Supervisors – August 11, 2026 meeting and File 26-624
• San Mateo County – Proposed ordinance amending Chapter 7.80 for Electric Micromobility Devices
• San Mateo County – February e-bike and e-motorcycle safety forum
• San Mateo County – 2026 e-bike policy background
• California Department of Justice – E-bike safety and legal requirements consumer alert
• ABC7 – Burlingame Police findings in the August 8, 2025 crash
• Bay City News / Redwood City Pulse – August 12, 2026 coverage of the Board vote