The Yellow A/c buses are between the tourism complex and Mamallapuram and the Blue A/c buses (run by TNSTC) are running between High Court, Marina, Valluvar Kottam and Ripon Building with 15 stops.
The Stake holders of these Yellow buses are some of the Prominent Hoteliers & Travel Operators.
Owing to the popular Chennai climate, thankfully the buses are Air-conditioned and unlike its famous counterparts at London, Munich, Paris its not open top. And they have a professional Guide in each bus.
For other options head directly here to the TTDC homepage.