Design Options Analysis - Deliverability & Operations Considerations

Option #1:

Surface-running LRT, with 10 stops.

Construction Impacts/Timeframes

Construction Impacts/ Timeframes
(informed by observations on Eglinton Crosstown LRT)

Least overall impacts to surrounding neighbourhoods due to:

  • A shorter construction period; and,
  • No need to accommodate underground construction sites.
Service Reliability/Winter Operations

Service Reliability/ Winter Operations
.

Significant weather-related disruptions are not expected. May experience minor service disruptions due to extreme weather events (e.g., ice buildup).

Option #2:

Underground LRT, with 10 stops.

Construction Impacts/Timeframes

Construction Impacts/ Timeframes

Longer overall construction period due to complexity of tunneling. Potential for significant surface disruptions at the 10 station locations to accommodate underground station construction.

Service Reliability/Winter Operations

Service Reliability/ Winter Operations

Tunneled portion under the Humber River Valley and floodplain could be more prone to flooding, leading to prolonged service disruptions.

Option #3:

Combination elevated and underground LRT, with 3 stops.

Construction Impacts/Timeframes

Construction Impacts/ Timeframes

Longer overall construction period due to complexity of tunneling and building elevated structures. Potential for significant surface disruptions at the three station locations and portal sites to accommodate underground station construction.

Service Reliability/Winter Operations

Service Reliability/ Winter Operations

Significant weather-related disruptions are not expected. Flooding issues avoided due to elevated portion at Humber River.

Option #4:

Combination elevated and underground LRT, with 7 stops.

Construction Impacts/Timeframes

Construction Impacts/ Timeframes

Longer overall construction period due to complexity of tunneling and building elevated structures. Potential for significant surface disruptions at the seven station locations and portal sites to accommodate underground station construction.

Service Reliability/Winter Operations

Service Reliability/ Winter Operations

Significant weather-related disruptions are not expected. Flooding issues avoided due to elevated portion at Humber River.

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