Overview
- A southbound vehicle crossed the median into northbound lanes on Route 3 in Chelmsford and struck multiple cars, according to State Police.
- One person was taken to a hospital with injuries that police say are not life‑threatening.
- The crash happened during the evening commute and caused multi‑mile backups while tow crews cleared the scene.
- Massachusetts State Police continue to investigate the cause and it is not yet clear whether charges will be filed.
- The incident follows other recent wrong‑way episodes and coincides with state discussions about installing detection systems and warning signs on highways.