Yeh Tamil Nadu aur Kerala and Karnataka mein rehne wala hi samajh payega.
There are 2 routes
By the end of 2016 all train coming from Chennai via JTJ-ED-CBE-SRR-MAQ will get WAP.
Till...
more... No MAS-MAQ TRAIN GETS WAP till SRR AND WDM from there to MAQ.
BUT Any train going to Managalore via Karur can go only on Diesel Engine till Erode. From Erode it can get ED WAP 4.
FOR EG. Train No. 12687 Madurai-Dehradun
It uses WDM 3D Between MDU-DG-KRR AND Loco change happens at Erode to Electric Loco.
Now two route are in electrification
Erode-Karur-Trichy
Salem-Karur-Trichy and also upto Dindigul. Total 300 kms which will get end by 2018 end or 2019 March.
Then all trains going from Coimbatore -Madurai,Nagercoil,Tuticorin,Trichy,Villupuram, Melmaruvathur, Puducherry will get End to End E-Loco