Pennsylvania Railroad's original Hudson tunnels (1904-1910)
The Pennsylvania Railroad spent six years digging twin rail tunnels under the Hudson, opening them in 1910 as part of its New York Improvements Project that included Penn Station. They have run continuously since, carrying millions of passengers per year.
The tunnels made direct rail service into Manhattan possible and anchored the Northeast Corridor.
Still in service 116 years later, they are the only rail crossing under the river and a leading cause of regional train delays.
The new project is the first to add capacity since 1910, and it is required before the old tunnels can be closed for repairs.
