sentences:  It runs mostly parallel to the Du Lièvre River and ends north of Mont-Laurier in the town of Sainte-Anne-du-Lac in the Upper Laurentians.Initially, the highway started at the junction of Route 148 in the Masson-Angers sector about 3 kilometers south of Buckingham and about 10 kilometers of its current southern terminus.An eastern extension of A-50, as part of the 3-phase project that would connect both segments of the highway between Buckingham and Brownsburg-Chatham (near Lachute) by 2010, was completed in 2005 and Transports Quebec relocated the route's southern to the current western segment terminus at Dougherty Road to act as a by-pass of Buckingham.