During the 20th century, South Brunswick saw extensive transformation with the impact of changes in transportation technology. The New Brunswick and Trenton Fast Line began operation in 1900, a trolley line running parallel to the Old Straight Turnpike of 1804 (Route 1), intersecting George's Road just north of the Five Corners intersection in Dayton. This trolley provided daily passenger and freight service, stopping at a local crossroads. The New Jersey Turnpike opened in 1951, again roughly parallel to Route 1, on the eastern edge of the Township. One effect of the Turnpike opening up Interchange 8A (just outside the township) was the transformation of the agricultural area on the southeast corner of South Brunswick to that of a burgeoning industrial development. Significant portions of land between Route 130 and the turnpike consist largely of warehouses.