Loco train length k hisaab se nhi, availability k hisaab se milte h. Bhot si trains h jinki length km h fir bhi WAP4/5/7 YA WDP 4B/4D milta or kuch 24 coacher train ko bhi WAG 5/7/9 mil jaata h. Length km hone ka matlab ye thodi h ki WAG 5 hi diya jaaye. Hbj-Jbp Janshatabdi bhi Mainly WAP 4 se chlti h uske coach to isse bhi km h. Train WCR ki h isiliye mne ET WAM4/WAP 4 mention kiye h.