Highway 400 is a major provincial highway in Ontario, Canada, stretching approximately 230 kilometers from Toronto to Parry Sound. It serves as a vital transportation route, connecting urban areas with rural communities and facilitating the movement of goods and people. The highway features multiple lanes in each direction, with several interchanges and access points. It is known for its scenic views, particularly as it approaches the Muskoka region, making it a popular route for travelers heading to cottage country. Safety measures, including rest areas and signage, are in place to ensure a smooth driving experience.