Police say Corporal Fernando Martinez crashed his police cruiser into a concrete barrier northbound on Route 270 just south of the Montrose Road exit in Rockville.
The accident happened just after 11p.m.
The police cruiser had minor damage to the front and driver’s side.
When police arrived they smelled alcohol on the officer’s breath and arrested him for drunk driving after he failed a sobriety test.
Martinez who is assigned to the Wheaton district did not suffer any injuries in the accident. He is a 33-year veteran of the Montgomery County police department and his arresting powers have been suspended.
Montgomery County police say the accident is still under investigation.