John Wolfe-Barry and Horace Jones, Tower Bridge, London, 1886-94
Movable bridges appeared at the end of the 19th century. Barry and Jones built Tower Bridge in London to resolve the problem of commercial traffic. The central structure is a movable roadway that can he raised or lowered to permit the passage of ships along the Thames.

Sir Benjamin Baker, Firth of Forth Bridge, Edinburgh, 1882-89
The bridge is composed of three giant units supported by pylons over a total length of about 2,500 meters; it was perfectly suited to the many visionary works of the period and was immediately popular Very few people criticized the bridge’s appearance, but among them was William [...]

Structural engineering applied to the making of bridges is one of the fields in which the application of the new construction technologies and materials introduced over the course of the 19th century produced significant changes.
The Coalbrookdale Bridge over the Severn River in England - built in 1779 to a design by Abraham Darby and John [...]