The Pittsburgh Light Rail (commonly known as The T) is a 26.2-mile (42.2 km) light rail system in Pittsburgh, Pennsylvania, and surrounding suburbs. It operates as a deep-level subway in Downtown Pittsburgh, but runs mostly at-grade in the suburbs south of the city. The system is largely linear in a north-south direction, with one terminus near Pittsburgh's central business district and two termini in the South Hills. The system is owned and operated by Pittsburgh Regional Transit.
The T is one of the surviving first-generation streetcar systems in North America, with the oldest portions of the network dating back to 1903 and the Pittsburgh Railways.[5] It is also one of only three light rail systems in the United States that continues to use the broad 5 ft 2+1⁄2 in (1,588 mm) Pennsylvania Trolley Gauge on its lines instead of the 4 ft 8+1⁄2 in (1,435 mm) standard gauge. In 2023, the system had a ridership of 3,417,100.
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