[Steve X]

arent the trains already preempting that by stopping right at the end of the platform as if there was an imaginary third car attached? the bollards look like they are already installed for that scenario

They have to stop like that to prevent a door being blocked. You can see they do that on the surface section.
In the tunnels, ATO would help. They also have these bollards in Ottawa too.

 

[urbanclient]

76 cars delivered:

Toronto Transit Commission 6200-6275 - CPTDB Wiki (Canadian Public Transit Discussion Board)

cptdb.ca

That would be 38 two-car trains. I do not know the spare ratio they use (perhaps someone else does) but I'll note that 25% of 38 rounds up to 10.

Someone mentioned 42 minutes for a one way trip (not the advertised 38 minutes), so let's assume 85 minutes for a full round trip when including minimal dwell time at terminuses. At 3.25 minutes headway that would require 27 trains. There are not enough cars to run 27 three car trains. However, there are enough to run 14 three car trains, 13 two car trains, with 8 out of 76 cars for spares. Line 1 ran with 65/76 trainsets during peak in early 2020, so a low spare ratio is not entirely unheard of.

 

[rbt]

Someone mentioned 42 minutes for a one way trip (not the advertised 38 minutes), so let's assume 85 minutes for a full round trip when including minimal dwell time at terminuses. At 3.25 minutes headway that would require 27 trains. There are not enough cars to run 27 three car trains. However, there are enough to run 14 three car trains, 13 two car trains, with 8 out of 76 cars for spares. Line 1 ran with 65/76 trainsets during peak in early 2020, so a low spare ratio is not entirely unheard of.

They can also be fancy and run 2:30 headways in the central/tunnelled portion and a 5 minute headway on the surface section. Torontonians have few issues with overlapping/branched service seen on numerous routes.