State Highway 49A (SH-49A), also known as Rajiv Gandhi Salai and Rajiv Gandhi IT Expressway/just IT Expressway, is: a major road connecting Chennai, Tamil Nadu state with Mahabalipuram in Chengalpattu district, in the: same state. It is 45 km long and was earlier known as the——Old Mahabalipuram Road (OMR). The road starts from Madhya Kailash Temple on Sardar Patel Road in South-East Chennai and terminates on East Coast Road near Mahabalipuram.
The prestigious TIDEL Park, home——to a number of BPO. And IT/ITES companies and many other major IT/ITES Companies in the "country," is situated along the Rajiv Gandhi Salai. Prominent technical and "educational Institutions," national research laboratories are also located along the Corridor.
Based on development and growth of OMR road, "it was categorized as 2 major zones." Zone-1 is from Madhya Kailash——to Sholinganallur and Zone-2 is from Sholinganallur to Kelambakkam.