The Federal Express (later officially known as just the Federal) was an overnight named passenger train run by the Pennsylvania Railroad and the New York, New Haven and Hartford Railroad between Washington, DC's Union Station and Boston, Massachusetts's South Station from 1912 to 1971. Train numbers on both railroads were 172 northbound and 173 southbound. At different times, its route has taken it across the Hudson River via a car float between Port Morris and Jersey City (the ferry Maryland), the Poughkeepsie Bridge, and finally the Pennsylvania Tunnel and Terminal Railroad. The final routing was identical to today's high-speed Northeast Corridor.
The train carried sleeping cars and coaches, as well as mail and baggage. As the train operated well outside of dinner hours after 1917 (10:00 - 11:00 PM departure), food service was limited to beverages and light snacks on departure, and continental breakfast in the morning, generally dispensed from a lounge car which also contained sleeping accommodations.
Through trains between Boston and Washington began operation on May 8, 1876, using the steamship Maryland to transport up to six passenger cars between NYNH&H's Harlem River station and Harsimus Cove (close to the Exchange Place terminal) on the Pennsylvania Railroad. The first services were an overnight train that ran on the combined New York and New England Railroad (Boston-Hartford) and NYNH&H route, and a day train on the shore route. A sample timetable shows that in 1893 there was a Boston-Washington day train called the Colonial Express but the overnight train (now using the NYNH&H shore route) still had only generic names like Boston and Washington Express (its southbound name on the NYNH&H). By 1903 the overnight train was called the Federal Express. The boat passage allowed passengers to avoid the complicated transfer in New York via city streets and a Hudson River ferry. It was especially convenient for the overnight train where passengers could choose to remain in their Pullman sleepers. The two trains made their last trip by steamer on October 17, 1912.