GST road, abbreviated for Great Southern Trunk road or NH 45 is a 4 lane highway connecting Chennai and Trichy in the south. This is the major road artery between Chennai, Tambaram, Dindigul and Theni, a total of 472 kms. GST road enters Chennai from the South and connects its southern suburbs with the international airport. Though the highway has heavy traffic flowing through it, there are several motels and restaurants along the entire stretch, including five-star hotels such as Le Royal Meridien, Trident Hilton and Radisson GRT near the Chennai International Airport. The GST road is now planned to
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