After a dozen years that included a successful tunneling feat and an unusual arrangement for station work, a 1.7-mile, $1.9-billion extension of San Francisco’s Central Subway wrapped up this month.
Rutgers Tube, which carries the F subway line under the East River between Manhattan’s East Broadway station and the York Street station in Brooklyn, was the last Metropolitan Transportation Agency under-river crossing to be rehabilitated after Superstorm Sandy hit the New York City area in 2012.
After a successful trial of a railcar-mounted robot to drill holes for tunnel cable racks, the MTA is putting together an open bidding process for vendors to further develop a robot drill rig for use in New York City’s subway tunnels.