"According to current information about the Ontario Line design, most stations will likely only have one set of elevators at each platform, meaning there will not be "dual elevators" at every station; this is due to cost-efficiency considerations and the design focusing on a single center platform at most stations."
Line 2 has a "temporary" 149 ETOBICOKE-BLOOR bus, running between KIPLING and HIGH PARK stations. To ensure customers have accessible connections to the stations and areas around the stations where elevators are being installed at, the TTC will be temporarily adjusting service on some routes and introducing a new route. (High Park – buses will pick-up and drop-off in the bus terminal. Customers can transfer to 189 STOCKYARDS for connection to Keele Station, which is accessible.) (Old Mill and Islington are not accessible at this time.) (There is no room at KEELE STATION for another bus route.) Also helps when an elevator out-of-service due to maintenance, vandalism, or mischief. Should be an accessible parallel bus to ALL rapid transit routes.
What about Line 3? There should be a parallel bus route or routes, whenever or just-in-case the elevators are out-of-service. Especially, if they refuse to install dual elevators, to "save money".
Don't know why they didn't just interline the 149 ETOBICOKE-BLOOR with the 189 STOCKYARDS. The HIGH PARK station is not accessible at this time, So they are telling people going east who need to use an elevator to transfer from the 149 to the 189, to use the elevators at KEELE station, and vice-versa going west. If "interlined", passengers could just stay on the bus to continue their trip. Must have been suggested by a non-handicapped, non-transit user.