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    Building CN's St. Clair River Tunnel

    Replacing one century's marvel of tunneling technology with another's will give CN a seamless intermodal route between Montreal-Toronto-Detroit and Chicago
    Kramer, Jerome | IuD Bahn | 1994
    Keywords: Tunnelquerschnitt

    Tunnel clearances: Newest approache

    Laser technology is among the innovations being used to help gain clearance in rail tunnels.
    Kramer, Jerome | IuD Bahn | 1995
    Keywords: Tunnelquerschnitt