UPSC 2002: With reference to Indian transport systems, consider the following statements: 1. Indian railways system is the largest in the world. 2. National Highways cater to 45 per cent of the total road transport demand. 3. Among the states, Kerala has the highest density of surface road. 4. National Highway No. 7 is the longest in the country. Which of these statements are correct?

Statement 1 is false—Indian Railways was (and is) the fourth-largest network after the USA, Russia and China. Statement 2 is broadly correct: National Highways, though only ~2 % of road length, carry about 40-45 % of road traffic. Statement 3 is incorrect—states such as Maharashtra have higher surfaced-road density than Kerala. Statement 4 is correct—old National Highway-7 (Varanasi–Kanyakumari, ~2 369 km) was the longest highway in 2002. Hence only 2 & 4 are correct. ([gktoday.in](https://www.gktoday.in/question/with-reference-to-indian-transport-systems-conside?utm_source=openai))