«Rocky», a tunnel boring machine, excavates 90 dump trucks’ worth of granite everyday.

This past week, another transit expansion milestone was reached in Toronto as progress on the Scarborough Subway Extension (SSE) tunnel hit its halfway point. Set to replace the now-defunct Scarborough RT, this extension of Danforth Line 2 will extend over 7 kilometres north and east of the line’s long-standing terminus at Kennedy station.