This shows a snow plowing operation on Highway 401 during active snowfall. Multiple snow plows are often lined up and drive together to clear several lanes at the same time. This method allows the highway to be cleared more efficiently and evenly, especially during heavy snow. The lead plow removes most of the snow, while the others help push remaining snow off the road and spread salt or sand to reduce ice buildup. Traffic is kept behind the plows to allow them to work safely and prevent snow f