THORNTON, Rockingham County, N.H., Oct. 12, 2026 — Two people were hurt on Sunday afternoon, October 11, when a vehicle rolled over on I-93 southbound in Thornton, according to dispatch traffic. One of the two had a hand laceration.
Both occupants were reportedly out of the vehicle by the time the update was issued around 3:05 p.m. The extent of injuries beyond the hand laceration was not immediately known, and it was not clear whether either person was taken to a hospital.
The crash was reported near mile marker 83.2 on I-93 southbound. Responders urged drivers to slow down and use caution in the area while crews worked the scene. No further details on what led to the rollover have been released.
We hope those who were hurt recover fully and quickly.
Why Rollover Crashes Happen on Highways Like I-93
Rollovers are rarely caused by a single factor. Most happen when a vehicle's tires catch an edge, a curb, soft shoulder, or guardrail, and the sudden sideways grip flips the vehicle rather than letting it slide. Engineers call this a tripped rollover, and it accounts for the large majority of cases, especially on higher-speed roads like interstates where a driver overcorrects after drifting onto the shoulder.
What happens inside the vehicle during the roll usually matters as much as why it started. A roof that holds its shape and a seat belt that keeps an occupant in position both cut the chance someone is thrown against the roof or ejected as the vehicle turns over. Unbelted occupants are far more likely to be tossed around the cabin or partly out of it, which raises the risk of serious head and spine injuries.
According to the Insurance Institute for Highway Safety, 24 percent of fatally injured occupants in crashes classified as other, which were mostly rollovers, were belted in 2023. That gap is one reason crash investigators look closely at belt use and vehicle structure when sorting out why some rollovers end with minor injuries, and others do not.
Frequently Asked Questions
Which vehicles are most prone to rollovers?
Taller, narrower vehicles with a higher center of gravity, such as SUVs, pickups, and vans, are more likely to roll over than low-slung passenger cars when they lose control or strike something at an angle.
How does seat belt use affect survival in a rollover?
A seat belt keeps an occupant anchored to the seat as the vehicle turns, cutting the chance of being thrown against the roof, a window, or out of the vehicle entirely.
What is a "tripped" rollover?
It happens when a tire catches a curb, soft shoulder, guardrail, or similar obstacle, and the sideways force flips the vehicle rather than letting it continue to slide.
How can drivers reduce rollover risk?
Staying within the lane, slowing before curves or shoulder drop-offs, and avoiding sharp overcorrections if a tire drifts off the pavement all help keep a vehicle from tripping into a roll.
What to Do After a Rollover Crash in Thornton, NH
Anyone involved in a rollover should stay as still as possible until checked by medical responders, since rollover injuries aren't always obvious right away. Even without visible damage, a sudden flip can jar the neck, back, or head, so it's worth getting evaluated at a hospital even if you feel fine at the scene.
If you're a witness or passing driver, slow down and give responders room to work, since rollover scenes usually involve partial lane closures and crews moving around an exposed vehicle. Anyone involved should also request a copy of the official crash report once it's filed, both for insurance purposes and for their own records.
