The Metrolinx Board meeting on March 25, 2021, brought two contrasting views of “good” rapid transit projects to the fore exposing inconsistencies in the “official story” about building above or below ground.
- An update on Capital Projects
- A presentation on the benefits of the Ontario Line above ground
- An update on the Yonge North Subway Extension
On the Capital Projects front, many works ranging from LRT lines to GO upgrades are on the surface although, of course, the central portion of the Eglinton line is underground. Progress on the surface LRT lines is swift thanks to the avoidance of underground work and complex tunnel structures.
But at the end of the presentation, the “big news” is that prime bidders for both the Scarborough Subway and Eglinton West LRT tunnels have been selected and negotiations are underway on contract details. Some early works such as construction of the tunnel boring launch site at Sheppard/McCowan Station will begin in April.
The long history of debates about Scarborough’s transit network do not bear repeating. Suffice it to say that the underground option is oft touted as the only way to provide good transit, albeit at substantial cost.
According to a Metrolinx Blog article, the line will be tunneled in one bore from Sheppard south and west to Kennedy Station rather than in two separate bores meeting at Lawrence East. This simplifies some of the construction staging and eliminates the potential for major upheaval for Scarborough General Hospital at Lawrence & McCowan. The line will be a single bore 10.7m diameter tunnel according to the Board presentation by Matt Clark.
On Eglinton West, despite the availability of land for a surface LRT right-of-way and demand projections well within the capacity of surface operations, the line will be buried from the Humber River westward as dictated by Premier Doug Ford in his transit plan.
In both cases there will be fewer stations that would have existed with surface LRT options, and on Eglinton ridership projections are lower as a result. (Scarborough is a more complex case because one subway has been substituted for two, if not three LRT lines in a network.) Access time between surface and subway routes – a key item Metrolinx always mentions about its surface alignments – is not mentioned when they enthuse about coming tunnel construction.
So let’s hear it for tunnels!
Ah … but not so fast …Continue reading