One of the two oldest extant segments of the Baltimore and Susquehanna Railroad Line lies beneath the MTA Light Rail tracks at Timonium Station. The line stretched north from Baltimore into Pennsylvania's Susquehanna Valley, and after the original route between Baltimore City and Timonium was completed in 1832 with wood ties supporting the rails, deterioration in that wood led the company, when construction resumed north of Timonium in 1835, to adopt a stone foundation process used in Great Britain. Using marble from nearby Cockeysville Quarry, the railroad completed the bed in what is now known as the Padonia Road Section, but excessive time, labor cost, and climatic changes affecting rail stability made stone track bedding a financial and operational disaster, so railroads quickly returned to wooden crossties. The virtually undisturbed marble track bed survives as an example of the experimentation and primitive technologies common in the early days of railroad construction in the United States and as a reminder of the longstanding popularity and utility of public transportation there.