A Waldoboro woman who told police she was returning from a methadone clinic was charged with operating under the influence Sunday morning after she reportedly fell asleep, crossed the centerline, and struck another vehicle head-on while traveling southbound on Route 1 in Warren.

Chief Deputy Timothy K. Carroll of the Knox County Sheriff’s Department said that Jillian Richards, 24, was alone in her 2005 Pontiac sedan when it crossed the centerline and struck a 2005 GMC truck head-on. The operator of the truck, 53-year-old John Engwer, 53, of Wrentham, Massachusetts, was transported to Penobscot Bay Medical Center in Rockport after complaining of pain.

Richards became trapped in her car and had to be extricated. She was flown by LifeFlight helicopter to Central Maine Medical Center in Lewiston with non-life threatening injuries. She was later charged with operating under the influence, driving to endanger and failure to have insurance, according to Carroll.

The collision took place around 6:30 a.m. on Route 1 in Warren, just south of its intersection with Route 90.