The Broadway Limited was the Pennsylvania Railroad's (PRR) premier named passenger train, operating daily in each direction between New York City and Chicago, via North Philadelphia. It replaced its predecessors, the Pennsylvania Limited (1887–1902) and the Pennsylvania Special (1902–1912). The Broadway was inaugurated in 1912 and outlasted the Pennsylvania Railroad, operating under Amtrak until 1995. The name referred not to Broadway in Manhattan, but rather to the "broad way" of the Pennsylvania Railroad's four-track right of way along a large portion of the route.
The schedule was 20 hours until 1932; it dropped to 16 hrs 30 min in 1935 and 16 hours flat when lightweight cars took over on June 15, 1938. From 1920 until 1936 the New York to Chicago fare was $32.70 plus the extra fare of $9.60, plus the Pullman charge (e.g. $9 for a lower berth).
Read more about Broadway Limited: Station Stops, Amtrak's Broadway Limited, Amtrak Consist