Banff National Park is bisected by two highways that cross the Alberta/British Columbia border while another provides a third access within Alberta. The Trans-Canada Highway (Highway 1) bisects the park in an east–west direction, connecting it to Vancouver to the west and Calgary to the east. Highway 93 bisects the park in a north–south direction, connecting it to Cranbrook to the south and Jasper to the north. The portion of Highway 93 north of Lake Louise is known as the Icefields Parkway whereas the portion southwest of Castle Junction is known as the Banff-Windermere Parkway. Highway 11 (the David Thompson Highway) connects the Icefields Parkway at Saskatchewan River Crossing to Rocky Mountain House to the northeast. Within the park, Highway 1A, also known as the Bow Valley Parkway, loosely parallels Highway 1 between Banff and Lake Louise.