The close routes round metros say Delhi being connected to Shimla, ASR, DDN, JP, needs trains that can guarantee a seats at short notices similar to buses. Many people just board Volvo buses citing non availability especially in overnight trains. While volvos only offer comfortable seating Railways have the potential pull back provided they introduce both AC/non AC seating in competition. the AC chair cars will allow last minute filling as it will not be the preferred class due to BACK BREAKER concept. But still trains are more comfortable than buses given they offer more relaxed environment (avoid vommiting) and toilets ofcourse. As per budget 2016 Uday DD trains are expected to run on similar concept.