Steve X
Senior Member
It's just a cost thing. Most modern systems are designed for 5% with 2 powered and 1 unpowered bogie (30m length). The new streetcars have all powered bogies.A streetcar can take an 8% grade, while a light rail vehicle is restricted to a 5% grade. A heavy rail vehicle is preferred to restrict itself to 3%. So those grade changes along the Crosstown are minimal for a light rail, a heavy rail setup would have to be more level.
Ummm sir, Toronto isn't flat. Even underground, the tunnels go up and down. There is change of grade (sloping) on the entire line. Burying the entire line would just cost over $10B. Here's what the engineering term "grade" actually means: https://en.wikipedia.org/wiki/Grade_(slope)Is the Science Centre Station underground at Don Mills? If it is, the. Won't there be 5 changes in grade along the Crosstown? At Mount Dennis, Liard, Don mills, Don mills, Kennedy. I feel like this is inefficient and should be underground all the way, but it's too late for that