I think that Indian Govt needs to go for bullet trains in following routes
1. Chandigarh - New Delhi - Lucknow - Varanasi - Kolkata.
2. New Delhi - Jaipur - Ajmer - Ahmedabad - Mumbai - Pune -Secunderabad - Bangalore
SPEED 350kmph
Seating...
more... capacity per train - 500 people.
Fully elevated tracks like Metro
Automatic signalling with 5 minute gap between two trains.