Karnaphuli Tunnel, Underwater tunnel in Chattogram District, Bangladesh.
The Bangabandhu Tunnel extends 3.32 kilometers beneath the Karnaphuli River, featuring two separate tubes with four lanes each for vehicle traffic.
Construction of this engineering project started in 2017, drawing inspiration from Shanghai's infrastructure model and opened to traffic in October 2023.
The tunnel represents Bangladesh's advancement in transportation infrastructure, marking the nation's first submerged roadway connection.
Vehicles travel at speeds up to 80 kilometers per hour through the tunnel, reducing the distance between Chattogram and Cox's Bazar by 40 kilometers.
The tunnel reaches depths between 18 to 31 meters under the Karnaphuli River, connecting the Asian Highway to the Dhaka-Chattogram-Cox's Bazar route.
Location: Chattogram District
Inception: October 28, 2023
GPS coordinates: 22.22770,91.80820
Latest update: May 26, 2025 20:12
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