Tunnelling: What You May Experience

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December 18, 2015

Dear Neighbour:

As you may know, the Eglinton Crosstown is a 19-kilometre light rail transit that includes a 10-kilometre underground portion, between Keele Street and Laird Drive. For the tunneled portion, we have tunnel boring machines (TBMs) operating around the clock - 24 hours a day, seven days week.

On average, the tunnel boring machines each travel about 10 metres per day. TBMs are working about 20 metres below ground, but we do sometimes hear from nearby residents who may experience vibration from the TBMs as they pass through the area.

In most cases, detectable levels of vibration are possible depending on where the TBMs are working at any given time. For example, as the TBMs drive through various soil conditions, vibration could be more discernable. Also, in the evenings and overnight hours when street level traffic is reduced, the TBM activity may be more easily recognized.

As the TBMs progress, any vibration that may be experienced will be short-lived, and will subside as the machines advance along their paths.


Currently, two TBMs are driving east from Allen Road, and two more are moving west from Laird Avenue. You can track the four TBMs on our Crosstown website.

TBM route map

Metrolinx works closely with the City of Toronto, as well as local elected officials to monitor any situation of concern or disruptions that are connected to the Crosstown’s construction. We know that during construction residents will be inconvenienced, and we work hard to keep people informed. We thank you for your patience as we deliver this important transit expansion project.

Check out the Tunnelling 101 Fact Sheet