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  They are building this rail tunnel, only 180 meters long, under the Macdonald–Cartier Freeway (so called Highway 401). They claim they are using these `innovative techniques`. To me, they are not new techniques. Am I missing something? "SEM (sequential excavation method): is a modern tunnel des...

  Tags: canada, ontario

  1591 days ago

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  Toronto initiates the procedures for $4bn Scarborough tunnel project

    Infrastructure Ontario and Canadian public transport operator Metrolinx have published a request for qualifications for a public–private partnership to excavate a US$4bn tunnel for the Toronto metro. http://www.globalconstructionreview.com/news/toronto-fires-starting-pistol-4bn...

  Tags: Canada, Ontario

  1508 days ago