A man was arrested for a suspected DUI after the driver allegedly hit a sign post and flipped his SUV on Highway 18 this morning.

Washington State Patrol troopers responded to a call of an SUV rolled over on westbound Highway 18 to northbound Interstate 5 around 1 a.m. The SUV partially blocked the ramp for less than an hour, said State Patrol Trooper Karim Doukadou.

The suspect was taken into custody but was released to St. Francis Hospital.

The State Patrol is conducting an investigation into the accident.

The Mirror does not name suspects until they have been charged.