A massive, ‘single-bore’ tunnel could be built for the underground portions of the Green Line, a move that would reduce street-level disruptions during construction of the $4.6-billion project.
Read more: https://bit.ly/2NkN84h
A massive, ‘single-bore’ tunnel could be built for the underground portions of the Green Line, a move that would reduce street-level disruptions during construction of the $4.6-billion project.
Read more: https://bit.ly/2NkN84h