Chennai–Thiruvallur High Road
| CTH Road, MTH Road | |
| Maintained by | Greater Chennai Corporation, Avadi Municipal Corporation |
|---|---|
| East end | Padi Junction, Padi, Chennai |
| West end | Thiruvallur |
Chennai–Thiruvallur High Road (CTH Road), formerly known as Madras–Thiruvallur High Road (or MTH Road), is one of the chief routes connecting the northwestern suburbs of Chennai, India. Starting from Padi Junction, the road connects the neighbourhoods of Padi, Ambattur, Thirumullaivoyil, Avadi, Pattabiram, Thirunindravur, and Thiruvallur. It is one of the four national highways that radiates out of Chennai city and is part of National Highway 205.
The road, however, is narrow with a width of 8 to 10 metres at its widest stretches. Over 100,000 passenger car units use the road every day.