The problem with Indian rail is the eccentric booking system. All intercity trains are booked out days or weeks in advance. This is because Indian Railways deals with excess demand not by varying the prices (yield management) but rather by allowing people to cancel reservations at no cost, with a waiting-list system for latecomers. I suppose it allows poor people to travel cheaply by planning in advance, but then so would yield-management pricing. A bit of a mystery.