On this week's episode: we go deep (pun intended) on tunnel boring machines (TBMs).

We talk with the director of construction for the Scarborough Subway Extension, Walter Trisi, about how TBMs work, how using them can help minimize disruptions above ground during construction and how the Scarborough Subway Extension is making history in Ontario.

Host:

Matt Llewellyn (@mattrolinx)

Guest:

• Walter      Trisi, director of construction, Scarborough Subway Extension

Producer/Social:

James Wattie (@jameswattie)

Learn more at blog.metrolinx.com

Credits:

Czar Donic / Red Red Shoes / courtesy of www.epidemicsound.com

Dusty Decks / Golden Crates / courtesy of www.epidemicsound.com

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