The New York and Harlem Railroad (now the Metro-North Railroad's Harlem Line) was one of the first railroads in the United States, and was the world's first street railway. Designed by John Stephenson, it was opened in stages between 1832 and 1852 between Lower Manhattan to and beyond Harlem. Horses initially pulled railway carriages, followed by a conversion to steam engines, then on to battery-powered Julien electric traction cars. In 1907, the then leaseholders of the line, New York City Railway, a streetcar operator, went into receivership. Following a further receivership in 1932, the New York Railways Corporation converted the line to bus operation. The Murray Hill Tunnel now carries a lane of road traffic, but not the buses.