Over the last 40 years , there have been only 3 trains connecting Mumbai & Chennai. It is high time to start a Duronto service between Mumbai & Chennai if not Shatabdi. This is again based on the leave that people get from their organizations to discover the Southern Region in the country with their families and educate their children and enjoy and learn more about Incredible India.Similarly, Madurai & Tiruchirappalli have developed into big urban cities and they require speedy connectivity between the metros directly. Hence Duronto between Mumbai and Trichy/Madurai is also required so that the travel time is considerably reduced and is cost effective.