"Whether or not the colonial police dismantle this blockade violently ... others will grow in its place," the protesters, who had been blocking the tracks since Wednesday, said in a brief statement to journalists at the scene before dismantling their banners and beginning to leave the area.
Montreal police are seeking an important witness in a fatal collision between a car and a train.
According to witnesses at the scene, the driver had a black beard and wore a beige turban. He spoke French and appeared to be of Indian origin.
About 200 vehicles were involved in a massive road accident Wednesday on a windswept stretch of the Highway 15, on Montreal's South Shore, injuring dozens and prompting a major emergency vehicle intervention.