Where is the Xiamen Undersea Sightseeing Tunnel?

The Xiamen Undersea Sightseeing Tunnel is located in the waters of Xunjiang Port.

The Xiang'an Tunnel is a cross-sea passage connecting Huli District and Xiang'an District in Xiamen City, Fujian Province, China. It is located in the waters of Xunjiang Port and is an important part of the urban trunk road in the northeast of Xiamen City. It is 6.05 kilometers long and 4.2 kilometers wide across the sea. The deepest point is 70 meters below sea level. The Xiang'an Tunnel consists of a surface road, an underwater tunnel part, a service opening, a two-way entrance and each ramp. The main section of the tunnel is arranged from southwest to northeast.

The Xiang'an Tunnel is designed with a three-hole tunnel scheme, with three-lane main tunnels on both sides, a service tunnel in the middle, and a ventilation shaft on each left and right tunnel. The plan layout of the tunnel adopts a combination of curves to avoid or reduce the adverse impact of weak structural zones on the tunnel. It is built in the form of three holes, with main tunnels on both sides and a service tunnel in the middle. The tunnel section adopts a nearly circular three-center arch.

Lane changing method of Xiang'an Undersea Tunnel

Vehicles on the side of the dotted line are allowed to change lanes in the direction of leaving the island, but vehicles on the side of the solid line are prohibited from changing lanes:

1. First The group lane change zone allows vehicles to change lanes from lane 3 to lane 2, and then from lane 2 to lane 1.

2. The second group of lane changing areas allows vehicles to change lanes from lane 1 to lane 2, and then from lane 2 to lane 3.

3. The third group of lane changing areas is the same as the first group of lane changing areas.

4. Large and medium-sized buses and trucks are not allowed to change lanes and can only drive in the rightmost lane.

Vehicles on the side of the dotted line are allowed to change lanes in the direction of entering the island, but vehicles on the side of the solid line are prohibited from changing lanes:

1. The first group of lane changing areas allows vehicles to change lanes from lane 1 to lane 2 , and then change lanes from lane 2 to lane 3.

2. The second group of lane changing areas allows vehicles to change lanes from lane 3 to lane 2, and then from lane 2 to lane 1.

3. The third group of lane changing areas is the same as the first group of lane changing areas.

4. Large and medium-sized buses and trucks are not allowed to change lanes and can only drive in the rightmost lane.

Reference for the above content: Baidu Encyclopedia-Xiang'an Tunnel