Ek coach me 120 seats honge to samjh sakte ho ki Recline karne k liye kitni jagah bachegi, Ye purane DD coaches ki hi repackaging hai. Flop hogi ye to, kisiko apni kamad torwani hai isme travel karke. Russian Railways Double Decker Air Conditioned Sleeper trains operate kerta hai, kum se kum uske design se inspired hoke kuch accha banate.