Its very clear from the report that the City has no intention of allowing this to go forward in its current form; to the extent it has a choice.
Very clear argument made:
-A train with a capacity of 1100 passengers used by the TTC on Lines 1 and 2 would offer more flexibility to meet increased demand and ensure that the project is fit for purpose further into the future compared to the capacity of 850 passengers being planned for Ontario Line
Also raised as concerns:
That they really want the same vehicle type as Line 2 for interoperability, economies of scale on train and train parts purchase etc etc.
That the OL design may require expansion of the LSE embankment which could create substantial problems including effecting existing city parks/community centres and private property.
That design mitigation is required for any elevated sections, and those costs are not currently budgeted.
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BIG note; the report also throws the City's own design at Osgoode under the bus.
Proposes running OL/RL down Simcoe, having interchange at St. Andrew, then west running under either King or Front.
From the report:
Further modifications to the representative alignment could improve public health and environment considerations in the western section, particularly some heritage impacts that were emerging during the preliminary design and engineering work being undertaken for the Relief Line South. If the alignment were to follow Simcoe Street to include an interchange station at St Andrew station, impacts to key cultural heritage resources around Osgoode station (e.g. Osgoode Hall, Campbell House, and 250 University Avenue) could be minimized by avoiding the need to construct a second platform on the Line 1 Osgoode station.
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The Ontario Line could enhance support of employment growth by considering an alignment following Simcoe and Front Streets, with an interchange station at St. Andrew. Providing a station closer to the Financial District and along the southern edge of the dense employment in the King-Spadina area, this alignment would have an even greater employment concentration of 320,000 existing jobs within 800 metres of stations, projected to grow to over 405,000 by 2041.