Littleton, MA (May 19, 2026) – A serious crash with injuries shut down portions of Interstate 495 Tuesday afternoon near Rte 2A in Littleton.
According to reports, 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.
Authorities later reopened the southbound lanes around 1:30 p.m., while portions of the northbound side remained closed as investigators continued working at the scene.
Traffic delays affected the area throughout the afternoon while crews cleared the roadway and documented the crash scene.
Authorities continue to investigate the cause of the accident, and more details will be released as they become available. We are thinking of those injured as they continue to recover.
Why Medical Helicopters Are Sometimes Used After Highway Crashes
Medical helicopters are often 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.
