I believe the main problem is when a line of conducting material (steel rail lines, overhead electricity supply wires) runs parallel with overhead electric transmission wires, a current will be induced in the line. With rail lines you can earth them I guess, but with the OCS you're trying to...
For some reason Essex Road's signage is frozen at 1994. The red & blue stripes are for the Network SouthEast brand of British Rail, which ceased to exist in that year on privatization.
The December 2025 Procurement Pipeline for Asset Management and Maintenance Services states that Metrolinx will be doing a pilot program with a diesel-battery hybrid loco starting with procurement in early 2027.
It's to allow construction of the island platforms in a construction Green Zone (no active rail traffic). From the Board Mtg GO Capital Projects presentation:
And this would also apply to the Bowmanville extension, which isn't currently planned to have OCS. Current plan is diesel powered express trains to Oshawa, then stopping at all stations but buying dual or tri mode locos / train sets might work.
As the different GO lines each achieve their "Mission", we'll need fewer and fewer diesel locos, with the target being only the Kitchener Line service needing them.
We've not being told a timeline for this "End State" but there seems to be a focus on launching Electric trains on the Lakeshore...
I think you'll eventually get your wish. The "End State Service" proposed in Board Mtg State of the Network presentation retains the existing fleet & diesel traction for services on the KI line to Malton, Bramalea and beyond but has "electric....service with new trains" on all the other lines...
You may be thinking of "Union Station 2031 and Related Planning Studies" a Metrolinx Board presentation from 2011-11-23. It started with 6 initial options {Improve TTC/GO integration at Bloor/Dundas West & Danforth/Main; Add satellite stations @ Liberty, Bathurst, Cherry; North Toronto Sub with...
Technically, there's an entrance/exit to the surface sandwiched between the Milton track and the new condo north of Crossways. Though the route is far from convenient, I believe this is the route most often used to connect between GO & TTC stations at the moment because the GO platforms are...