TNSTC SETC operates two air conditioned buses made in ashok leyland assembled chasis from salem to chennai and chennai to salem vice versa. The service has got good patronage with general public adding to that running full most of the time.
SETC have introduced AC services in many other routes also.
About the author:
A Public Transport Enthusiast ! Writing About Namma TNSTC and SETC in this blog !! I am trying to connect with Travel Enthusiast using Public Transport as there regular choice of travel !!