Google Maps
(The annotation seems broken as of this writing. The institute is on 4th cross street just before the MGR Film Institute.)

The Institute is located on a side road (now called Kalikundram Main Road) off Rajiv Gandhi Salai (a.k.a. Old Mahabalipuram Road a.k.a. OMR). The side road is prominently indicated on the OMR median. If approaching from the south (Tidel Park / SRP Tools / beyond), after passing Tidel Park / Thiruvanmiyur MRTS station, take the SECOND left (at a foot overbridge, just before the Indira Nagar MRTS station), and go about 100 metres down. The main campus is on your left, the guest house complex on the right. If approaching from the north (Sardar Patel Road / Adyar / Guindy etc), turn onto OMR, go 2 km down, take a U-turn at the signal (Tidel Park / Thiruvanmiyur MRTS), and then come back as above.