[mykalberta]

Does anyone know what a 4 lane highway would cost per km?

Its possible YWG is taking the moderated approach with a population of only 650Kish. Instead of spending alot of money on new vehicles they can utilize existing infrastructure and bus MTCE facilities and just run articulated buses. Depending on the number of stops, lights, etc its the more economical choice.

And then when the population or ridership gets to a sufficient amount they can then install tracks. In the long run yes its more expensive but it lowers the capital cost at the beginning.

Also without knowing the cost of purchasing the land required its not really a fair comparison with another City's per km cost unless they are talking apples vs apples.