Line 1 Yonge-University is a major subway line in the Toronto Transit Commission (TTC) system, serving the city of Toronto, Canada. It runs from the northern suburb of Vaughan to the southern end at Union Station, covering a distance of approximately 38 kilometers. This line is known for being the busiest in the TTC network, connecting various neighborhoods and key destinations. The line consists of two segments: the Yonge line, which runs north-south, and the University line, which runs west-east. It features numerous stations, including major hubs like Bloor-Yonge and St. George, facilitating transfers to other subway lines and transit services.