I was quite amazed when I found the Chennai Metropolitan Transport Corporations Bus website with lots of useful information. This will be of great help for those looking for Bus Routes, connections, AC Bus timings, frequencies and various stagewise bus information of Chennai’s Local Bus service ie MTC.
In the stagewise route information you can select any starting (or boarding ) point and Destination and the site gives all the Buses covering the routes (even if your boarding point is in middle of a route). Also the expected time of journey, frequencies and map (under construction as of now).
MTC Official website : http://www.mtcbus.org/
MTC Bus Routes : Bus routes
MTC Bus Stages(Place wise routes) : Stage wise routes
AC Bus Timings : AC Bus Timings