[5] The tunnel from 23rd to 32nd streets was completed by 1933, but construction on the remaining segment was put on hiatus due to the Great Depression and World War II.

Amtrak and SEPTA considered reopening the tunnel in the early 2000s, but the September 11 attacks ended those plans.

[7] In December 2018, SEPTA received a $15 million grant from the United States Department of Transportation to make significant improvements to the station.

[8][9] The improvement project was projected to cost over $37 million, with remaining funds contributed by SEPTA's capital budget and the developer Brandywine Realty Trust,[8] which owns 3000-3020 Market Street directly above the subway station[10] and is planning the Schuylkill Yards megaproject.

[8] A second access point to the station at the corner of 31st and Market streets reopened in late 2019, which includes a staircase and new elevator.