With a rash in collisions along the 401, primarily in construction zones, authorities are warning motorist to take more care. 
An Amherstburg mother and son were killed in one of several multi-vehicle crashes along the busy highway over the weekend.
Chatham-Kent OPP say drivers need to use extra caution when driving through areas of construction and where people are working on or near the road.
Authorities say it’s important to drive carefully and adjust your driving to suit the conditions, don’t change lanes, and be ready for sudden stops.