A sweeping new study from NYU Langone Health, released this month, lays out the most detailed picture yet of who is getting hurt on America’s e-bike and e-scooter boom — and the picture is uglier than the headline numbers suggest. Researchers reviewed 914 patients treated for micromobility injuries at NYC Health + Hospitals/Bellevue between 2018 and 2023, and found that crashes involving e-bikes and e-scooters now account for roughly 7% of all trauma admissions at the level-one trauma center.
What the Study Found
The trend line is the part that should worry every commuter. The share of trauma cases at Bellevue tied to micromobility devices climbed from under 10% in 2018 to more than 50% in 2023 — a faster jump than NYC’s e-bike fleet itself. Among the 914 patients analyzed:
- One-third sustained a traumatic brain injury (TBI).
- More than two-thirds required hospital admission.
- Roughly 30% needed intensive care.
- Fewer than one in three riders were wearing a helmet at the time of the crash.
- About half of all crashes involved a collision with a car or truck.
The pedestrian data is even starker. Of the 69 pedestrians struck by an e-bike or e-scooter in the dataset, brain-injury rates were nearly double those of the riders themselves — a reminder that the safety conversation around micromobility is no longer just about the rider on the saddle.
Why It Matters
This is the second major e-bike injury dataset to drop inside a week. Last week, a Norwegian cohort study found e-bikes were statistically safer than conventional bikes per kilometre ridden. The two findings are not contradictory — they are complementary. Norway’s analysis was a population-wide rate study; NYU Langone’s is a clinical look at who actually ends up on the operating table, in a U.S. city with very different infrastructure, very different traffic, and a thriving food-delivery industry that puts e-bikes on the road during the worst possible hours.
Injuries in the NYU dataset peaked between 6 p.m. and 8 p.m. — exactly when commercial delivery traffic surges and visibility starts to fall. That timing strongly implicates two unfixed problems: the lack of protected lane miles and the lack of helmet uptake among delivery riders working long shifts on bikes they often don’t own.
The Infrastructure Gap Behind the Numbers
Senior author Dr. Charles DiMaggio framed the takeaway bluntly in the study release: helmet use, speed enforcement, and protected bike lanes are the three levers that determine whether this problem gets better or worse. The infrastructure piece is where New York is most behind. According to a Planetizen analysis of the same data, 94% of NYC cycling fatalities in 2023 occurred on roads without a protected bike lane, and just 3% of Manhattan’s bike-lane mileage is physically separated from car traffic.
That’s the context for the city’s recent proposal to install a two-way protected bike lane along the entirety of 72nd Street in Manhattan and the DOT’s free-helmet-and-light giveaways running through the spring. Both initiatives target exactly the gaps the NYU study quantifies.
What This Means For You
If you’re an e-bike commuter — in New York or anywhere else — the data points to four practical changes that move the needle more than any new gadget will.
1. Wear a properly rated helmet, every ride
The single most controllable variable in the NYU dataset was helmet use. If you’re shopping new, the PIKIO Si just set a new Virginia Tech helmet safety record for rotational-impact protection — the failure mode most strongly linked to TBIs. A 5-star Virginia Tech rating is the cleanest spec to look for.
2. Pick routes by lane separation, not distance
An extra 0.4 miles on a protected lane beats the shortest route through mixed traffic almost every time. Most cycling-routing apps now let you weight protected infrastructure; turn that on. Our complete guide to e-bike commuting walks through how to plan a route that prioritizes lane separation rather than minutes saved.
3. Treat the 6 p.m. to 8 p.m. window as high-risk
If you have flexibility, ride before or after the dinner-delivery surge. If you don’t, that’s the window where a high-vis layer, daytime-running tail light, and zero earbuds matter most.
4. Don’t trade speed for caution where the lane ends
The half-of-crashes-are-with-cars finding lines up with rider experience: most serious incidents happen at junctions, lane terminations, and the spots where protected infrastructure abruptly stops. Drop your speed before those transitions, not after.
The Bigger Picture
The NYU Langone study is the kind of evidence base U.S. cities have been missing. Outside North America, places like Paris have been able to slash cycling fatalities by aggressively building separated lanes. The Bellevue trauma data essentially quantifies the cost of not doing that — measured in admissions, ICU days, and TBIs.
It’s also a reminder that this is no longer just a recreational story. E-bikes and e-scooters are the fastest-growing segment of urban transportation in America, and the people most exposed are working delivery riders putting in 50+ hours a week on hardware they may have inherited from a previous shift. The policy conversation needs to catch up to that reality — and the helmet and lane data in this study is a clean place to start.
Key Takeaways
- 914-patient NYU Langone study found e-bike/e-scooter crashes now drive ~7% of trauma admissions at Bellevue, up from under 10% of cases in 2018 to over 50% by 2023.
- One-third of patients had a traumatic brain injury; fewer than one in three were wearing a helmet.
- Pedestrians struck by micromobility vehicles had nearly double the brain-injury rate of riders.
- 94% of NYC cycling fatalities in 2023 occurred on roads without protected bike lanes.
- Helmet use, route-by-lane planning, and avoiding the 6–8 p.m. delivery surge are the three biggest levers individual riders can pull today.
