A 44-year-old Brampton man is in life-threatening condition following a road rage incident in Orangeville.Ontario Provincial Police say just after 5:30 p.m. on October 10, investigators were called to Third Street following reports of a road rage incident that escalated into an assault.A Brampton man was airlifted to a trauma centre with injuries described as life-threatening.Brandon Demerchant, 33, of Orangeville is facing a charge of aggravated assault. Police say he had a bail hearing and remains in custody.No other details of the incident were immediately available.