Cheonsa Bridge, Suspension road bridge in Sinan County, South Korea
Cheonsa Bridge is a 10.8 km road crossing linking Amtae Island and Apae Island in Sinan County, South Korea. It is the country's first bridge to combine a cable-stayed section, with two A-shaped towers 195 and 135 meters tall, and a three-tower suspension bridge whose pylons are H-shaped concrete towers. The deck carries three lanes, including a variable lane, and the structure was built to allow 5,000-ton ships and 320,000-ton oil tankers to pass.
Construction started in 2010 following years of planning and continued for nine years until completion. Traffic began flowing on April 4, 2019, establishing a direct road link between previously isolated islands.
The name derives from the Korean word for angel and refers to nine islands forming a diamond pattern when viewed from above. Local residents regard this link as a symbol connecting communities that relied solely on ferries before the crossing opened.
The crossing is a motor-vehicle-only road, so pedestrians, bicycles, carts and farm machinery are barred; only emergency-registered motorcycles may pass. The roadway has three lanes in each direction including a variable lane, not two. The cable-stayed section leaves 39.8 m of clearance for 5,000-tonne ships, while the suspension span rises 74 m above the water for 320,000-tonne tankers.
The crossing combines a cable-stayed section with a three-tower suspension span, the first such suspension bridge over the sea in South Korea. Its two A-shaped cable-stayed pylons stand 195 and 135 metres tall, while the suspension bridge's three H-shaped concrete towers reach 163.2 metres at the centre and 150.4 metres at the sides.
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