NEW CANAAN — Police arrested two New Canaan residents on drunk driving charges on Sunday, including one who had additional DUI warrants out on her from 2009.

On Sunday around 12:20 a.m., an officer on patrol on Park Street observed a vehicle swerving in and out of the lanes. The officer pulled over the vehicle and spoke with the driver, Carol Ellis of Douglas Road, and detected an odor of alcohol coming from her vehicle. The officer searched the vehicle and conducted a field sobriety test on Ellis, which she failed, police said.

Ellis, 54, was arrested for failing to drive right and operating under the influence. She refused a breathalyzer test, police said. She was released on $250 bond.

When Ellis was taken into custody, police found she had an outstanding arrest warrant from 2009. In August 2009, New Canaan police investigated a motor vehicle accident on Oenoke Ride Road near Oenoke Lane. Based on that investigation and a subsequent search warrant for Ellis’ blood alcohol content, a warrant was issued for her on charges of operating while under the influence, driving in the right-hand lane and evading responsibility.

Ellis was arrested and released on $5,000 bond for the latter charges. She was given a court date of Tuesday for both incidents.

Later on Sunday, around 9:15 p.m., New Canaan police received a report about a loud crash on West Road by Weed Street. Police investigated and found that a vehicle had struck an object near the traffic island. The vehicle was disabled as a result of the crash.

Police spoke with the operator, Brock Harris, of Weed Street, and determined he had been drinking. Harris, 24, failed a field sobriety test and was arrested for operating under the influence, failure to drive right and failure to carry insurance or identification.

A chemical analysis revealed Harris’ blook alcohol content to be .15 at the time of the incident, almost double the legal limit of .08. He was released on $250 bond and is to appear in court on Wednesday.