Throughout much of Canada, there are at least two routes designated as part of the Trans-Canada Highway (TCH). For example, in the western provinces, both the main Trans-Canada route and the Yellowhead Highway are part of the Trans-Canada system. Although the TCH, being strictly a transcontinental route, does not enter any of Canada's three northern territories or run to the Canada–US border, the Trans-Canada Highway forms part of Canada's overall National Highway System, providing connections to the Northwest Territories, Yukon and the border, although the NHS (apart from the TCH sections) is unsigned.[4]