Subways are justified in only the most dense population areas. They make people go underground so that buses and streetcars may have the streets. But should we make people go underground so that a few private autos may have the street? Studies show that a new subway in Toronto is a bad investment. This should raise suspicion about the motivation of its promoters.
"If you compare a Sheppard subway line to all of the other transit options that have been brought to the table over the past couple of years, a subway line for Sheppard would cost the most per kilometer and serve the fewest number of Torontonians per dollar invested...." Pembina