this train never reach on time...TPJ to MS is very slow ..no speed at all....but MS to TPJ is better in speed and timing....
Between tbm and ms it has a huge slack so it will reach ms on time or most of the days it is reaching ms before the scheduled time.
Even a passenger can take a max of 1 hour between budalur and trichy but a prestigious train is going to take 1 hour and 40 minutes
Even Rockfort takes nearly 45 min between GOC and TPJ.This is for even if train arrives late at GOC it will arrive ONT or BT at TPJ this is called slack.(Distance between GOC and TPJ is 3km)
Slack could be 30 to 45 minutes but more than 1 and half hour is too much
What if train arrives 30 mins late at GOC
Need to maintain smooth speed
If Train has aggresive schedule,slack is required
Though the TT is revised , 16853 MS-TPJ EXP has crossing with 16854 at SY or VDL , crossing with 12084 at MV , crossing with 16234 at KMU which takes arrival at TJ by 2.55pm - 3pm . so that's the case it reaches TPJ by 4 pm .