The 55km bridge and tunnel linking Hong Kong to mainland China opens on Tuesday after years of delays, reports BBC.
From end to end, including its two link roads, the bridge is about 20 times the length of San Francisco's Golden Gate Bridge.
Construction on the project began in 2009 but has been marred by delays and safety concerns. It has repeatedly overshot its budget, ultimately costing more than $20bn.
Buses and commercial vehicles will carry passengers and freight over the bridge. Local taxis are not allowed on it and only a few private cars will get a permit to cross.