Karnaphuli Tunnel
| Overview | |
|---|---|
| Location | Chittagong, Bangladesh |
| Coordinates | 22°13′49″N 91°48′16″E / 22.2304°N 91.8044°E |
| Status | Operational |
| Waterway | Karnaphuli River |
| Route | 2 |
| Start | South Patenga |
| End | Anwara Upazila |
| Operation | |
| Opened | October 28, 2023 |
| Owner | Government of Bangladesh |
| Traffic | 17,000 per day |
| Toll | ৳200-৳1,000 |
| Technical | |
| Design engineer | Chinese |
| Length | 3.32 km (9.39 km including approach road) |
| No. of lanes | 4 |
| Operating speed | Maximum 80 km/h |
| Width | 10.8 m |
| Depth of tunnel below water level | 18 to 31 m |
| Grade | A1 |
The Karnaphuli Tunnel (Bengali: কর্ণফুলী টানেল) is an underwater expressway tunnel in the port city of Chittagong, Bangladesh under the Karnaphuli River. The length of the entire route is 9.39 kilometres (5.83 mi), with the tunnel making up 3.32 kilometres (2.06 mi) of the length. The tunnel diameter is 10.80 metres (35.4 ft). It is expected, over 17,000 vehicles will be able to use this tunnel daily. The cost of the project is estimated at US$1.1B, of which around half is financed by the Exim Bank of China. The Karnaphuli Tunnel is the first underwater road tunnel in South Asia. It is expected to improve the Dhaka–Chittagong–Cox's Bazar highway network. A Chinese company, China Communications Construction Company, was selected to construct it. The tunnel segments were produced in Zhenjiang, China.