1 side vestibule/gang way hota h.
You can see it here:
/blog/post/5416377Wese sahi keh rhe ho iske response pe doubt to hum logo ko bhi hai thoda, fare kaafi jada h, normally 4 me se 3 coach hi full ho paate h CC k JS me to iska kya hoga wo dekhne wali baat h.