The Huangmaohai cross-sea bridge, one of the major cross-sea projects in the Guangdong-Hong Kong-Macao Greater Bay Area, is expected to open for traffic in December, official reports said.

Linking Zhuhai and Jiangmen, the bridge will strengthen the economic and trade ties between the two cities and promote the region's coordinated development, authorities said on Monday.

The project starts in Zhuhai's Pingsha town and ends in Doushan town in Taishan city, which is under the administration of Jiangmen. It is 31 kilometers long, including a 14-km section above the sea.

Once in operation, the previously one-hour trip will take vehicles only 30 minutes to reach Zhuhai from Jiangmen via the massive two-way and six-lane project, which includes two bridges, two tunnels and a service area.

It has been designed to allow a speed of more than 100 kilometers per hour and a service life of 100 years.

The project is the world's longest three-tower cable-stayed highway design bridge.