As traumatic injuries and fatalities surge among children involved in crashes on e-bikes and other electrified vehicles, one California prosecutor is taking a hard line by filing criminal charges against some of the young riders' parents.

This is just one of the measures officials nationwide are taking to address the growing problem, while families struggle with a confusing mix of local laws and guidelines about which enhanced bikes and scooters are safe or even legal for their children to ride.

Following the recent death of a 17-year-old in a crash involving an illicit vehicle, New York City’s mayor has dispatched cease-and-desist notices to dozens of online retailers marketing “e-bikes” that fail to meet street-legal standards.

Meanwhile, in neighboring New Jersey, newly enacted regulations mandate that e-bike riders be at least 15 years old and secure both a license and vehicle registration.

Yet do these measures truly achieve their intended effect?

Advocates for cycling contend that the regulations may be excessively sweeping, unfairly targeting low-powered e-bikes rather than swifter motorized vehicles, while certain parents question whether fragmented, localized approaches suffice.

Monica Stafford, a San Francisco-area mother whose teenage daughter sustained a skull fracture after falling from an e-bike, asserted that officials are "missing the mark" should they intend to place the onus solely on parents.

The San Rafael resident emphasized the necessity of a unified, nationwide regulatory framework.

"We're in a total Wild West of laws," Stafford said.

"Supporting sensible regulations doesn't mean you're against e-bikes, just as you can be in favor of cars but still think it's unwise to hand the keys to a 10-year-old."

The two-wheeled machines have become almost everywhere in recent years, from groups of teenagers speeding around California beach towns to the many delivery drivers weaving through the heavy traffic of Manhattan's crowded streets.

As expected, hospital visits for injuries from e-bikes, e-scooters, and other motorized rides have soared as they have become more popular, according to numerous studies.

However, researchers stress that the more worrying trends are the severity of the injuries and the fact that they are especially common among children.

The principal finding is that individuals tend to sustain considerably more severe injuries than they would on a conventional pedal bicycle, stated Dr. John Austin, a physician at the University of California San Diego School of Medicine who spearheaded a recently published statewide study.

On the whole, these patients are typically younger, frequently ride without helmets, and consequently present with more grave injuries.

Under federal law, most e-bikes are categorized as nonmotorized vehicles akin to conventional bicycles, which exempts riders from licensing, insurance, and even helmet requirements.

However, the majority of states have imposed supplementary regulations on higher-powered models, encompassing minimum age stipulations and mandatory helmet use.

In New York City, the death of a 17-year-old just steps from City Hall has reignited debate over e-bikes.

Gabriel Nacato had been riding a vehicle marketed as an “e-bike” that was not legal on city streets.

Earlier this month, Mayor Zohran Mamdani cautioned more than 40 online retailers, including Amazon, Walmart and Target, that they could incur fines of up to $2,000 for each sale of an e-bike that contravenes city regulations.

New York state mandates that riders of all e-bike categories be at least 16 years of age, while New York City enforces additional stipulations, including a 15 mph (24 kph) speed cap.

California, by contrast, imposes no statewide minimum age for lower-powered models, although riders must be 16 or older to operate e-bikes capable of reaching 28 mph (45 kph).

New Jersey and Illinois are among the states that have enacted statewide regulations recently, and Massachusetts is weighing measures.

Meanwhile, Florida Gov. Ron DeSantis in June vetoed a 10 mph (16 kph) speed limit and other e-bike regulations, saying the measures would lead to “enhanced surveillance” of citizens.

In Southern California, Orange County District Attorney Todd Spitzer reports that his office is currently handling more than two dozen active investigations into parents, following the establishment of a dedicated unit targeting cases involving children and e-bikes or e-motorcycles.

The office has already brought charges against four individuals, among them the mother of a 14-year-old boy who is accused of fatally striking an elderly pedestrian while operating an e-motorcycle.

The mother's attorney declined to comment, yet Mitchell Krems, the legal representative for another parent, dismissed the allegations leveled against his client as "absurd," contending that she was being unfairly singled out as a "scapegoat."

Richard Eyssallenne entered a plea of not guilty to charges of child endangerment, following prosecutors' allegations that he purchased an electric motorcycle for his 12-year-old son and assisted him in illegally modifying it to increase its speed.

The boy subsequently ran a red light and sustained injuries after being struck by a car.

Other jurisdictions have likewise moved to hold parents accountable.

In Ohio, a suburb of Columbus has recently introduced new regulations governing e-bikes, stipulating that parents who knowingly permit their children to contravene the rules face the same penalties as the rider.

PeopleForBikes, a national bicycle advocacy group that monitors state e-bike regulations, emphasized that many of the problematic vehicles are actually electronic motorcycles—with heavy frames, sturdy tires, and sizable motors—that are deceptively marketed as e-bikes.

Advocates contend that lower-powered and pedal-assisted e-bikes, which have a long track record of safe use on U.S. streets, are instrumental in diminishing society's dependence on automobiles.

"Many of the dangerous behaviors people cite — running red lights, riding on sidewalks, not wearing helmets — are already illegal," added Chloé Lauer, executive director of the San Diego County Bike Coalition.

"We'd rather see those laws enforced than add new restrictions that limit mobility for kids who are riding responsibly."

Anya Dalal, a San Francisco-area high school senior who has been advocating for enhanced safety protocols, contends that the issue demands multifaceted interventions, including the imposition of age restrictions.

“It ought to be a combination of parental responsibility, accountability on the part of manufacturers and retailers, and education for young people so they grasp e-bike regulations and road safety,” remarked the 17-year-old Hillsborough resident.

Sharon Franke, a mother from the San Diego area, concurred, though she noted that the initial step begins at home, with parents conducting their own research, accompanying their children on rides, and reinforcing safety measures once they venture out independently.

“We want them to have fun, but we also want them to come back safe and we don’t want them to hurt anybody,” she said as her 15- and 12-year-old sons prepared to attend a safety training last weekend.

“How do you balance all of it? It’s just overwhelming right now.”

Reporters Amy Taxin and Christopher Weber, based in California, together with Anthony Izaguirre in New York, made contributions to this report.

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