What tunnel runs under the Hudson River and has a ventilation system innovated by Ole Knutsen Singstad?
Ole Singstad Ole Knutsen Singstad (June 29, 1882 – December 8, 1969) was a Norwegian-American civil engineer who innovated the ventilation system for the Holland Tunnel (which subsequently became commonly used in other automotive tunnels) and advanced the use of the "Sunk-tube" method of underwater vehicular tunnel building, a system of constructing the tunnels with prefabricated sections.
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.