Just a quick update, shall post a few pics soon..
Thanks once again to all those that posted tips on the route query forum. The trip was great..
The route taken (up) was Mysore-Nanjandud-Chamrajnagar-Dimbam-Bannari - Sathy-Gobi-Erode-Karur-Dindigul-Madurai. This however, is the longish route. Reason was I wanted to go to Erode.
GQ four laning is going on between Karur and Dindigul even to Madurai. So roads are single lane only, but you can still drive safe and fast because the road is good.
Roads are excellent once you cross KA border and step into TN. Almost all speed breakers have warnings boards plus markings. Even minor dips in the gradient have markings before and after..Lanes are marked, white line has breaks to indicate side streets, etc. I am not referring to GQ section, talking about other roads. I think these are not done by NHAI/GOI but by TN Govt. with sponsorship by nearby mills/businesses, because nothing of this sort exists in KA side. The pothole count in 100 metres of roads around Chamrajnagar far exceeds the count for the streets of TN that I drove through..enough said.
Driving through the Dimbam ghat section is great - 27 hairpin bends in a 6km or so distance...falls 1800ft from Dimbam to Bannari. BTW there is a great website (
Falling Rain Genomics: World Index, and other pages) which lists altitude, GPS coordinates of almost all small towns and even some villages in India. Had to plot this manually into the NoniGPS software inside my PPC, and that helped a lot. It was amazingly accurate too. Wonder how they collected all this info..never seen so much info in any GOI website or Yahoo/Google etc.
Do not rely on IMS maps - word of mouth enquiry is best. IMHO we are another 10 years away from having reliable maps of even prominent highways, let alone smaller ones. They can be at best rough indicators of where towns are.
The return was through the shorter route - this is Madurai-Dindigul-Oddanchatram-Dharapuram-Tiruppur-Avinashi-Puliampatti-Sathy (no need to touch Kangeyam etc). I was told this is the best route by several locals. The only hassle in this is the drive through Tiruppur town but the entire stretch has great roads, nice countryside and Reliance outlets for fuel. But you need to ask around at every turn and sometimes ignore posted signs.
Locals are of great help when it comes to advising on routes, hotels etc. Driving habits are horrible but trucks surprisingly are well behaved. It is the two wheeleers and cars plus private buses that are driven badly with poor courtesy/manners. Most drivers keep the horn button permanently pressed like a fire engine, hoping that clears the road. If you are sensitive to noise, you will be driven crazy. Traffic within Tiruppur, Dindigul and Erode town is horrible with small 30-40ft roads carrying lots of buses, trucks, motorcycles and what not, each blasting the rest off the roads with their horns. Madurai roads are broader.
Did not drive overnight, stayed in hotels. Not much of updates on sights to see because this was a short business trip. There is a nice temple in a small town called Kodumudi which is after Erode, before Karur. Worth a visit, as it is right next to the Cauvery.