From Wikipedia:
The Icefields Parkway, also known as Highway 93 north, is a scenic road in Alberta, Canada. It parallels the Continental Divide, traversing the rugged landscape of the Canadian Rockies, travelling through Banff National Park and Jasper National Park. It links Lake Louise with Jasper to the north. At its southern end, the Icefields Parkway terminates at the Trans-Canada Highway (Highway 1). Highway 1 west goes to Yoho National Park in British Columbia and Highway 1 east to Lake Louise and the Town of Banff. A second parkway, the Bow Valley Parkway also links Lake Louise and the Town of Banff. Known as Highway 1A, this road parallels Highway 1 and, at the midpoint, passes the Castle Mountain junction where Highway 93 south, or the Banff-Windermere Highway, branches southwest into Kootenay National Park in British Columbia.
The Icefields Parkway, 230 km (140 mi) long, was completed in 1940. It is named for features such as the Columbia Icefield, visible from the parkway.
The parkway is busy in July and August with up to 100,000 vehicles a month. The parkway is mainly two lanes with occasional passing lanes. It minimizes grades and hairpin turns but travellers must look out for wildlife, and vehicles stopped on the shoulder. Snow can be expected at any time of year and extreme weather is common in winter.
A Canadian national parks permit is required to travel on the Icefields Parkway; stations near Lake Louise and Jasper enforce the law. Commercial trucks are prohibited. The speed limit is 90 km/h (55 mph) although the limit is reduced at Saskatchewan River Crossing and the Columbia Icefield area. In winter, chains or all-season radial tires are required by law and road closures are not uncommon.
