BATH — A dramatic two-vehicle crash that closed Route 1 for several hours Monday evening sent four Brunswick residents to area hospitals, two with serious, life-threatening injuries.

Just after 6:30 p.m., a 2003 Acura driven by 22-year-old Joseph Boyington of Brunswick rear-ended a 2008 Lincoln sport utility vehicle on Route 1 northbound just north of the Congress Avenue overpass.

Boyington, of Brunswick, then lost control, struck a sign and rolled onto the right side median.

The Lincoln, driven by Stephanie Thacker, 43, of Brunswick, was pushed several hundred feet, Bath Police Chief Michael Field said today.

Boyington was taken by a Brunswick rescue crew to Maine Medical Center in Portland with “serious, life-threatening” internal injuries, including broken bones and internal injuries, Field said.

Boyington is in fair condition this morning, according to a hospital representative.

His passenger, 21-year-old Michael Mason, also of Brunswick, was taken by LifeFlight to Central Maine Medical Center in Lewiston, also with “serious life-threatening” injuries, including broken bones and several internal injuries.

Mason was listed in critical condition this morning, according to a CMMC spokeswoman.

Thacker and her 11-year-old son, Adam, were taken by Bath rescue workers to Mid Coast Hospital in Brunswick, where they were treated and released, according to a hospital spokesman.

Route 1 was closed in both directions for approximately 20 minutes while a LifeFlight helicopter landed and took off, Bath Fire Chief Stephen Hinds said today.

The highway’s northbound lanes were closed for several hours for the rescue effort and then reconstruction. Traffic was redirected to the West Bath exit and State Road.

No extrication was required, according to Hinds. Approximately 20 firefighters from Bath, Brunswick and West Bath responded.

Brunswick police and Maine State Police are reconstructing the crash, but Field said witnesses stated Boyington was driving “at very excessive speeds.”

“Initially we believe Boyington, in the Acura, was traveling at a significantly high rate of speed, and when he came upon Witch Spring Hill, coming into Bath, he struck Miss Thacker’s vehicle,” Field said today.

The police chief said police found no evidence of alcohol at the scene, but have requested blood tests.

bbrogan@timesrecord.com