Chinese President Xi Jinping announcing the opening of the bridge on Tuesday morning.
On Tuesday in the mainland city of Zhuhai, Xi declared the span officially open as digital fireworks exploded on a screen behind him and officials ticked off another made-in-Chinese world record.
"With the bridge, the traveling time between Hong Kong and the Western Pearl River Delta region will be shortened significantly, thereby bringing the Western Pearl River Delta region within three hours' drive from Hong Kong", the city's transport secretary, Frank Chan, said Friday.
Still, even if it is a fairly useless 420,000 metric tons of steel, effective only at destroying dolphin habitats, with its opening, the bridge has already served its greater objective of bringing Hong Kong closer still to mainland China.
The bridge's unusual undulating structure is created to keep open vital navigation channels in the Pearl River Delta, which boasts some of the world's busiest ports.
It is reported that Xi's motorcade hopped onto the bridge immediately after the ceremony and purred across the boundary between mainland and Hong Kong waters.
Its construction is said to have depleted the number of dolphins in Hong Kong and they can no longer be found in the waters around the bridge.
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Luo Guocai, a bridge builder, said it was part of his work to report on finding white dolphins in the nearby sea areas.
It's taken just nine years to build..
Political analyst Willy Lam said the launch by Xi showed his support for Hong Kong's economic and political integration into the region, adding that the Pearl River Delta had always been the "new growth pole of China". The bridge, one of the world's longest, will shrink commute times between the three cities. About 40,000 vehicles are expected to use the bridge on any given day, with shuttle buses running every 10 minutes.
The project has also come under fire for shoddy labor standards and for adverse environmental impacts.
This link itself is impressive in its own right and consists of land and marine viaducts, a tunnel and a short road section.
And drivers will have to change which side of the road they are on at the crossing.
Taxpayers in Hong Kong had to foot nearly half the bill.
When delivering her policy address earlier this month, Chief Executive of the Hong Kong Special Administrative Region (HKSAR) Carrie Lam said that the commissioning of the Hong Kong-Zhuhai-Macao Bridge would improve Lantau, HK's largest outlying island, to a "Double Gateway" to the world and other cities in the Guangdong-Hong Kong-Macao Greater Bay Area, as it was the landing point of both the bridge and HK's International Airport. "I'm sure Beijing knew clearly that we didn't quite need it and that it was not necessary for the time being". A former British colony, Hong Kong reverted to Chinese control in 1997, but it was granted semi-autonomous status. Mainland China has opposed protests and expressions of civil liberties that are guaranteed under Hong Kong law.