The mighty Ontario Highway 401 isn’t just a road — it’s the backbone of Ontario and one of the busiest highways in the entire world. Stretching over 800 kilometres across Ontario, Highway 401 connects major cities like Windsor, London, Toronto, Kingston, and all the way to the Quebec border. 📍 In Toronto, it expands to 18 lanes in some sections — making it one of the widest highways on the planet. 🚗 On its busiest stretch, it carries over 400,000 vehicles per day. It fuels our economy, support