Monday 25th March 1968

Tinsley Viaduct, a two-tier road bridge in Sheffield, England; the first of its kind in the UK, opened. It carries the M1 and the A631 1033 metres over the Don Valley, from Tinsley to Wincobank, also crossing the Sheffield Canal, the Midland Main Line and the former South Yorkshire Railway line from Tinsley Junction to Rotherham Central. The structure is unusual in that it is built as steel box girders, at a time when most long span bridges were being built of post tension concrete deck design.