A 37-year-old Westport woman driving on Main Street with her two young children had blood-alcohol content of more than four times the legal limit when she collided head-on with another vehicle that was stopped at a traffic light Tuesday night, police said.

Lara O'Brennan, of Twin Circle Drive, was charged with operating a vehicle under the influence of alcohol, failure to drive right and two counts of risk of injury to a minor after she failed two breath tests, police said.

The woman's blood-alcohol level was 0.350 and 0.367, according to police, close to a level that would have left her unconscious.

Officers were dispatched to an accident near 243 Main St. shortly after 8 p.m., and after speaking with O'Brennan, detected an odor of alcohol on her breath, according to the report.

O'Brennan was later charged with evading responsibility after police determined that she struck another car on Main Street and left the scene of that accident.

No one was injured in the collision, police said.

She was released on $500 bond and is scheduled to appear April 25 in Superior Court.