First section of the Metropolitan Railway opens

On August 13, 1863, the Metropolitan Railway in London inaugurated its initial 3.75-mile stretch from Paddington (Bishop's Road) to Farringdon Street, marking the birth of urban rapid transit. Engineered by John Fowler with steam locomotives hauling wooden carriages, the line addressed severe traffic congestion in the growing metropolis. Despite smoky conditions from coal-fired engines, it carried over 30,000 passengers on opening day. This innovation influenced subway systems worldwide, from New York to Tokyo, and evolved into the London Underground's Circle and Hammersmith & City lines. Its success spurred the 1860s railway mania in Britain and demonstrated the viability of cut-and-cover tunneling techniques still used today.