What tunnel runs under the Hudson River and has a ventilation system innovated by Ole Knutsen Singstad?
Holland Tunnel The Holland Tunnel is a highway tunnel under the Hudson River between Manhattan in New York City and Jersey City, New Jersey. Its two tubes carry eastbound and westbound Interstate 78. In New Jersey, it is also designated NJ 139. An integral conduit within the New York Metropolitan Area, it opened in 1927 as the first of two vehicular tunnels under the river, the other being the Lincoln Tunnel. Both are operated by the Port Authority of New York and New Jersey.
Bulls Ferry Bulls Ferry (also Bull's Ferry) is an area along the Hudson River, just north of Weehawken Port Imperial in the towns of West New York, Guttenberg and North Bergen in New Jersey. It takes its name from a pre-Revolutionary settlement belonging to the Bull family, who operated a row-and-sail ferry to the burgeoning city of New York across the river.