Article Detail Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) Similar Questions : 1. Which is the Densest populated State of India ? Answer: West Bengal 2. Which is longest railway station ? Answer: Grand Central Terminal, Chicago(USA). 3. Which is the longest rail tunnel in India ? Answer: Pir Panjal (J&k, 11215 metre) 4. Which is the smallest state of India by Population ? Answer: Sikkim 5. Which is the Densest populated State of India ? Answer: West Bengal 6. What is the name of tallest Animal ? Answer: Giraffe 7. Which is the longest River in the World ? Answer: Nile Read more from - Longest and Largest