Here i like to share some usage of 5 platforms of Katpadi junction.
This info completely based on my experience/observation at Katpadi junction. This is common scenario and PF#3,4 & 5 may can vary based on Peak/emergency time..
Your inputs/Tips also welcome.
PF#1:
Trains...
more... from Chennai, Arakkonam line to Jolarpettai line
Trains from Renigunta line (via Tiruttani) to Jolarpettai line
Trains from Kanchipuram line to Jolarpettai line
PF#2 & 3:
Trains from Jolarpettai line to Arakkonam, Chennai line
Trains from Jolarpettai line to Renigunta line (via Tiruttani)
Trains from Jolarpettai line to Kanchipuram line
Trains from Villupuram, Vellore line to Arakkonam, Chennai line
Trains from Villupuram, Vellore line to Renigunta line (via Tiruttani)
Passenger/MEMU trains from Chennai, Arakkonam line to Jolarpettai line & reverse vice versa
Passenger/MEMU trains from Chennai, Arakkonam line to Vellore line & reverse vice versa
PF#3,4 & 5:
Trains from Jolarpettai line to Renigunta line (via Chittor, Tirupati)
Trains from Jolarpettai line to Villupuram, Vellore line (Rake reversal)
Trains from Villupuram, Vellore line to Jolarpettai line (Rake reversal)
Trains from Renigunta line (via Chittor, Tirupati) to Jolarpettai line
KATPADI origin Passenger/MEMU train to Jolarpettai line
PF# 4 & 5:
Trains from Villupuram, Vellore line to Renigunta line (via Chittor, Tirupati)
Trains from Renigunta line (via Chittor, Tirupati) to Villupuram, Vellore line
KATPADI origin Passenger/MEMU train to Villupuram, Vellore line
......
Nonstop/Passing trains uses the tracks between Platform 1 & 2.