Article Detail Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) Similar Questions : 1. Which is longest railway station ? Answer: Grand Central Terminal, Chicago(USA). 2. Which is the biggest country in Area ? Answer: Russia 3. Which is the highest waterfall in the world ? Answer: Angel, Venezuela 4. Which is the state largest by area in India ? Answer: Rajasthan 5. Which is the Densest populated State of India ? Answer: West Bengal 6. Which is the brightest planet ? Answer: Venus 7. Which is the Densest populated State of India ? Answer: West Bengal Read more from - Longest and Largest