Littleton, MA (May 19, 2026) – A serious crash with injuries shut down portions of Interstate 495 on Tuesday afternoon near Route 2A in Littleton.
The collision occurred around 12:30 p.m. on the northbound side of I-495 near mile marker 72. Emergency units responded to the scene and requested a medical helicopter due to the severity of the injuries.
Officials have not confirmed how many people were injured or released details regarding the extent of those injuries. Both northbound and southbound lanes of the highway were temporarily closed to allow the helicopter to land safely.
Later, the southbound lanes were reopened around 1:30 p.m., while portions of the northbound side remained closed as investigators continued working at the scene.
Authorities continue to investigate the cause of the accident, and more details will be released as they become available.
We wish those injured a speedy recovery.
Why Medical Helicopters Are Sometimes Used After Highway Crashes
Medical helicopters are requested after serious highway accidents when rapid transport to a trauma center may improve treatment times for critically injured patients. Air transport can be especially useful when crashes occur in congested traffic areas or when injuries require specialized medical care.
Investigators reviewing major highway crashes typically examine vehicle damage, roadway conditions, and traffic flow leading up to the collision. Skid marks, debris patterns, and lane positions may help explain how the crash occurred.
Temporary highway closures are common during helicopter landings because emergency crews need a secure area free of moving traffic. These closures also allow responders to safely treat victims, remove damaged vehicles, and document evidence from the scene.
