A roadside breath test found the woman was twice the drink drive limit.
A woman has been arrested on suspicion of drink driving after crashing her car and flipping it onto its roof on a roundabout in Merthyr Tydfil.
It happened on the A4060 in the early hours of Sunday.
Inc 262 - A4060 Merthyr— South Wales Police Roads Policing Unit (@SWP_Roads) 29 December 2019
Driver of this vehicle called us having ended up upside down in the middle of a roundabout. She waited at scene for officers to arrive & was promptly arrested on suspicion of drink driving when she provided a roadside reading of 79! (Limit is 35)