Chennai outer ring road is 62.3 km long connecting NH 45 (GST Road) at Perungalathur, NH 4 (GWT Road) at Nazarathpet, NH 205 (CTH Road) at Nemilicherry (Thiruninravur), NH 5 (GNT Road) at Nallur and TPP road at Minjur under the process by Chennai Metropolitan Area.