With regard to the Trans-Canada Highway: (a) what does the government consider the total length of the Trans-Canada Highway to be in kilometres; (b) how many kilometres remain “untwinned”, by province (i.e., single-lane highways designated with the Trans-Canada label); and (c) what is the cost per kilometre to “twin” sections of the Trans-Canada Highway that are currently single-lane and, if there is a difference from province to province, how much does it cost by province to twin the Trans-Canada Highway?