Article Detail Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) Similar Questions : 1. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) 2. Which is largest Dam in World ? Answer: Three Gorges (China) 3. Which is the smallest state of India by Population ? Answer: Sikkim 4. What is the name of brightest star ? Answer: Sirius 5. Which is longest river of India Answer: Ganges 6. Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) 7. Which is the longest River in the World ? Answer: Nile Read more from - Longest and Largest