15th Street/City Hall station

15th Street/City Hall station is a rapid transit station complex in Philadelphia, Pennsylvania, located partially underneath Philadelphia City Hall. It is served by the B, L, and T lines of the SEPTA Metro system. The three lines have separate platforms connected through an underground concourse.

The Market Street Subway, used by the L and T, runs east-west under Market Street. The L uses the inner tracks, with two side platforms located between 15th Street and 16th Street. The five T services (T1, T2, T3, T4, and T5) use the outer tracks, which curve outward at 15th Street to loop around City Hall. The eastbound side platform for the T is located west of 15th Street; the westbound side platform is at the northwest corner of City Hall angled to the street grid. The four-track Broad Street Subway, which runs primarily north-south under Broad Street, angles west of Broad Street between Penn Square South and Arch Street. It passes under the Market Street Subway. The B has two island platforms between the tracks; the inner tracks are used by B2 express service, while the outer tracks are used by B1 local service. The B platforms are divided by thick walls that support the City Hall structure above. All six platforms at 15th Street/City Hall are connected by passageways within fare control. The concourse level has two north-south passages, outside of fare control, that flank 15th Street. They form part of the Center City Concourse, a system of underground passageways that connect transit stations in the Center City area. The concourse connects to Suburban Station and 13th Street station outside fare control; a now-closed passage formerly connected to Walnut–Locust station. The station has nine sets of faregates; most connect to the Center City Concourse. The station has seven full-time entrances – two on the east side of 16th Street, two on the west side of 15th Street, and three in Dilworth Park – plus two on the east side of City Hall that also serve 13th Street station. Three entrances are open limited hours: two in the City Hall courtyard (each with a separate stairs and escalator) and one in Centre Square. Two elevators connect the east concourse and street lev

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