The cost of the subway is NOT expensive if you amortize the cost of the tunnels over the 100+ years they will be in service. We've had an LRT in Scarborough for 30 years and now it is worn out. What's the cost of replacing the LRT every 30 years? No thanks. The subway is the way to go.  BTW, all you people demanding a subway relief line already have one.  It is called the Carleton streetcar that runs out of Main Street station. Too slow? Welcome to our world.