Overhead view of roadway on suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge worker close to traffic on suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Overhead view of roadway on suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Workers walking along roadway of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Portrait of bridge worker under suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers walking on cable of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers on top of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers on parapet of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers on top of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers in meeting under suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge worker operating inspection gantry on suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Bridge workers walking on parapet of suspension bridge. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge

Civil engineers inspecting structure under carriageway of suspension bridge. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Civil engineers inspecting structure under carriageway of suspension bridge. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Civil engineers inspecting cable anchorage in suspension bridge. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Civil engineers inspecting cable anchorage in suspension bridge, low angle view. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Portrait of engineers in front of cable anchorage in suspension bridge. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Civil engineers using torch to inspect cable anchorage in suspension bridge. The Humber Bridge, UK, built in 1981 was the world's largest single-span suspension bridge

Suspension bridge at sunset. The Humber Bridge, UK was built in 1981 and at the time was the world's largest single-span suspension bridge