The canal's southern terminus at Lock 8/Port Colborne on Lake Erie is 326 1/2 feet (99.5 m) higher in elevation than the northern terminus at Lock 1/Port Weller on Lake Ontario. The canal comprises eight lift locks, each 80 feet (24.4 m) wide by 766 feet (233.5 m) long. Due to the "Garden City Skyway", which carries the "Queen Elizabeth Way" superhighway connecting Toronto and Buffalo, the maximum ship height allowed is 116 1/2 feet (35.5 m) high. All other highway crossings are either moveable bridges or tunnels. The maximum permissible vessel length is 740 feet (225.5 m). It takes ships an average of 11 hours to traverse the canal's length in either direction.