In order to meet the Van Sweringens' guidelines that the Rapid would not travel in street traffic, the brothers bought a 51% interest in the 523-mile (842-km) New York, Chicago and St. Louis Railroad (Nickel Plate Road) in 1915 from the New York Central Railroad. The route gave the Van Sweringens an unobstructed path to downtown Cleveland. From this acquisition, the Van Sweringens formed the Nickel Plate Securities Corporation, from which they would use investor money to buy a controlling interest in other major United States rail companies. At their zenith in 1928, the Van Sweringens controlled 30,000 miles (50,000 km) of rail worth $3 billion, nearly all of it purchased through credit. Lines under their control included the Erie Railroad, Pere Marquette Railway, Hocking Valley Railway, and Chesapeake and Ohio Railway. They managed to control this huge (for the time) system by a maze of holding companies (including the Alleghany Corporation) and interlocking directorships.