Travelled on 08 Oct 2015.
Route
Electronic city - Hosur - Krishnagiri - Salem - 80km through Salem-Chennai highway, then take right - then 100 kms through Veppur, Virudachalam bypass - Bhuvanagiri - Chidambaram
Toll
Attibele - Rs. 25
Krishnagiri - Rs. 60
Thoppur (before climbing down ghat road) - Rs. 86
Omallur, Salem (Just before Periyar University) - Rs. 69
Toll - 47
Toll - 49
From Salem, go straight on three roundabouts. After crossing third roundabout, you can see a overbridge go over the bridge and again go straight on the bridge, there is a deviation to right, which takes you to Madurai.
In the Salem-Chennai highway, there are unexpected two lanes are there, be careful with that. After few kilometres in two lane again four lane starts. 2 or 3 places are like this, be careful with two lane road in between.
There are two toll booth (both around Rs. 50) in the 80km stretch of Chennai highway, after around 2 kilometres from second toll booth you have to take the service road, go under the bridge and take right to Veppur, Virudachalam, Bhuvanagiri, Chidambaram stretch. The 100 kms after deviating from Salem-Chennai highway is in bad condition. Drive carefully through this.
Safe Drive !!!