Kingsway tramway subway

Former tram tunnel in London

The Kingsway tramway subway is a cut-and-cover tunnel in central London, built by the London County Council, and the only one of its kind in Britain. The decision in 1898 to clear slum districts in the Holborn area provided an opportunity to use the new streets for a tramway connecting the lines in the north and south. Following the pattern of tramways in New York and Boston, it was decided to build this as an underground connection.

This keyword could refer to multiple things. Here are some suggestions: