Tamil Nadu State Transport Corporation [TNSTC] — porur to siet bus fare differences

Address:

Chennai, Tamil Nadu, 600116

Conductors are collecting more money while travelling from siet to porur 18 rs. While porur to siet is 16 rs. Not sure why the cost difference.. Whether this is an issue with conductor or transport dept.. Route bus number 54. Chennai, tamilnadu.

Ticket details:
T a[protected]:38:03
Mic express 54 01 as m
54 pan/ d5/ 136 c14511 mp1/364
Dms-porur