The former Victoria's Secret and Sports Illustrated model appeared in court Tuesday to answer to the charge.
Police say the 47-year-old Seymour backed her SUV into another car on an Interstate 95 exit ramp on Jan. 15 in Greenwich.
This is a photo police took of her while she was in custody:
Police say Seymour was unsteady, her eyes were bloodshot and her breath smelled of alcohol. Police say she refused field sobriety tests.
She was also charged with crashing into a utility pole and leaving the scene in a separate incident that day.
She told a judge Tuesday she applied to an alcohol counseling program.
Her lawyer says she isn't seeking preferential treatment and wants to put the episode behind her.