Top 10 Railway station, My ranking based on a combination of passenger traffic, train operations, historical importance, connectivity and popularity is
1. New Delhi
2. Howrah Junction
3. Mumbai CSMT
4. MGR Chennai Central
5. Secunderabad Junction Railway Station
6. Ahmedabad Junction
7. Lucknow Junction & Lucknow Charbagh
8. Vijayawada Junction Railway Station
9. Nagpur Junction
10. Bhopal Junction
Howrah Junction is among the busiest railway station as per source
Approximately 1 million passengers per day travels, Also India's High no. of platform 23, Over 210 unique trains and nearly 1,000 daily arrivals and departures. Annual Footfall Recorded over around 61 million outward (originating) passengers in recent fiscal assessments.