The Severn Bridge is a suspension bridge that crosses the River Severn between England and Wales in Great Britain. Construction of the bridge began in 1963 and the bridge was opened in 1966 by Queen Elizabeth II. The bridge replaced boats that crossed the river. The Severn Bridge is 1,600 meters long and has a span of 988 metres.
The bridge deck was designed to be aerodynamic for wind hitting the bridge. All major modern suspension bridges use this design on the bridge deck. Beyond the 1980s, the bridge was overloaded and the bridge often had to close due to strong winds. The bridge was part of the M4 motorway until 1996. In 1996, the Prince of Wales Bridge opened which increased capacity and was built in a less windy location.