The 47-year-old, who was driving a white Mercedes AMG, was arrested on suspicion of drink driving after the crash near Warrington just before 2pm yesterday (Wednesday, July 27).
Emergency services were called to the southbound carriageway between junction 20 and 21 where the Mercedes was involved in a crash with a red dropside lorry and a black Nissan Qashqai.
Traffic monitoring website Inrix reported that one of the vehicles veered over the central reservation into oncoming traffic.
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The Nissan overturned and one of its passengers - a woman - suffered serious injuries. She was taken to hospital but police say her condition is 'non-life-threatening'.
A police spokesman said: “Officers were called just before 2pm on Wednesday, July 27 to the M6 between junction 20 to junction 21 following reports of a collision involving a red dropside lorry, a black Nissan Qashqai and a white Mercedes AMG.
"As a result of the collision, the Nissan overturned.
"A passenger in the Nissan, a woman, has sustained serious but non-life-threatening injuries.
"The driver of the Mercedes, a 47-year-old man from Chorley, has been arrested on suspicion of drink driving."