DARIEN — A 33-year-old Stamford woman was charged with drunk driving when an officer stopped her on Interstate 95 after her slow and sporadic driving caused a traffic backup.

On March 18 around 1:20 a.m., Charleen Merced-Agosto was seen by an officer driving a gray 2010 Toyota Prius on I-95 South near exit 10. The Maitland Road resident was driving slowly, causing a backup, and kept switching lanes without signaling. The officer attempted to pull Merced-Agosto over at a rest area, but the woman drove by the area’s gas pumps and near the rest stop exit before stopping.

Merced-Agosto said she was driving home to Stamford from Bridgeport. Her eyes were red and glassy, her speech was slurred and the smell of alcohol was coming from her car. Merced-Agosto subsequently failed a field sobriety test and was placed under arrest for driving under the influence and failing to give a proper turn signal.

Merced-Agosto’s blood alcohol content around 2:15 a.m. was .177 and, 20 minutes later, was .167.

Merced-Agosto was released on a $50 cash bond. She is scheduled to appear in Stamford Superior Court on March 28. Her car was towed from the highway.

ekayata@hearstmediact.com; @erin_kayata