Two options are being recommended for EA approval since the high cost and complexity of construction for both requires further comparison at a more detailed level of design:
1) Option 2b – LRT underground to subway platform level at Don Mills Station; and,
2) Option 3b – Shallow subway extension to Consumers Road with surface LRT (note that EA approval already exists for an easterly extension of the subway, but that earlier EA approval did not include a surface LRT connection)
8.6.1 Recommended Option 2b - Underground LRT Connection
Option 2b, with an underground LRT connection to the subway platform level at Don Mills Station (Figures 8-7 and 8-8), would require extending the subway platform to the east, with LRT tracks on either side. For customers east of Victoria Park and destined to the subway, the option is equally as favourable as a shallow subway extension, while the cost is lower and the tunnel construction would be designed to allow for a future subway extension. However, the separation between the subway and LRT is still under policy discussion; separation between vehicles could be between 100-125 metres.
8.6.2 Recommended Option 3b - Subway Extension
Option 3b, with a shallow subway extension to Consumers Road, would require an LRT “station†in the middle of Sheppard Avenue (east of Consumers Road) with direct passageways to the subway below (Figure 8-9). This option avoids the need for travellers from the Business Park to travel one stop and then transfer to the subway as per Option 2b (above). As such, Option 3b is a much more effective “catalyst†for denser, transit-oriented development in this development node. However, the cost is much higher for this alternative and more detailed design is necessary to determine if a “shallow†subway is achievable. More work is required on the depth needed to avoid inducing settlement of the Highway 404 bridge and to avoid the large, 6 metre deep sanitary sewer near Consumers Road.