Here is a summary of the Wikipedia article on the Harrisburg Transportation Center:

The Harrisburg Transportation Center (HTC), historically known as Pennsylvania Station or Harrisburg Central Railroad Station, serves as a vital railway station and transportation hub in Harrisburg, Pennsylvania. Strategically located on the eastern edge of Downtown Harrisburg, it is the primary nexus for passenger rail and intercity bus services for the Harrisburg metropolitan area and the broader South Central Pennsylvania region. The facility plays a crucial role in connecting passengers to various local, regional, and national destinations.

The current station building is the third to occupy the site. Originally built by the Pennsylvania Railroad (PRR) in 1887, it underwent a significant reconstruction in 1905 following a major fire in 1904, resulting in its distinctive barn-style roof. While technically a union station (used by multiple railway companies like the PRR, Reading Railroad, Northern Central Railway, and Cumberland Valley Railroad in its earlier iterations), it was never formally designated as such. The station holds significant historical importance, being listed on the National Register of Historic Places in 1975 and designated as a National Historic Landmark. Architecturally, it's notable for its red brick exterior, contrasting with later white stone stations, and for being one of the few U.S. railway stations still featuring a train shed over its tracks.

Owned by Amtrak and managed by the Harrisburg Redevelopment Authority, the HTC building offers more than just transit services. It houses office spaces above the main lobby and includes a large meeting area called the Pennsylvania Room. Passenger amenities, while somewhat limited, include a newsstand offering refreshments and reading materials, vending machines, short-term storage lockers, restrooms, and payphones. A unique feature is a preserved PRR GG1 electric locomotive displayed on one of the station tracks, visible to waiting passengers.

Amtrak is the primary rail service provider, with its Keystone Service (for which Harrisburg is the western terminus) and Pennsylvanian routes operating along the Keystone and Northeast Corridors. These services connect Harrisburg to major cities like Philadelphia, New York City to the east, and Pittsburgh to the west. In Federal Fiscal Year 2018, HTC was the third busiest Amtrak station in Pennsylvania and the 22nd busiest nationwide, largely due to substantial passenger traffic to and from Philadelphia. Intercity bus services are provided by Greyhound Lines and Fullington Trailways, offering direct routes to numerous cities within Pennsylvania (e.g., Philadelphia, Pittsburgh, State College) and out-of-state (e.g., New York City, Baltimore, Washington D.C.), with further connections available via transfers.

Complementing its intercity services, the HTC is well-connected to local and regional public transit. Capital Area Transit (CAT) provides numerous local bus routes with stops near the station. Rabbit Transit offers weekday commuter services to York, Lebanon Transit connects to the city of Lebanon, and R & J Transportation provides commuter routes from Schuylkill County. These connecting services, with stops within a short walk of the HTC, facilitate convenient transfers for passengers, solidifying the station's role as a comprehensive transportation hub.