Chennai–Thiruvallur High Road
Map of Chennai-Thiruvallur High Road with NH 716 highlighted in red SH-U 148 highlighted in green | |
| Route information | |
| Maintained by National Highways Authority of India, Tamil Nadu State Highways Department | |
| Length | 35 km (22 mi) |
| Component highways | NHAI, TN-SH |
| Major junctions | |
| East end | Padi Junction, Chennai |
| Ambattur Estate Jn NH 32 Telephone Exchange Jn Dunlop Jn Ambattur-Redhills Rd Jn Avadi-Poonamallee Road Jn Outer Ring Road Jn, Pattabiram Peripheral Ring Road Jn, Putlur | |
| West end | Thiruvallur |
| Location | |
| Country | India |
| State | Tamil Nadu |
| Highway system | |
| State Highways in Tamil Nadu | |
Chennai–Thiruvallur High Road (CTH Road), formerly known as Madras–Thiruvallur High Road (or MTH Road), is a major road connecting northwestern suburbs of Chennai, India. Starting from Padi Junction, this arterial road connects the suburbs of Padi, Ambattur, Thirumullaivoyal, Avadi, Pattabiram, Thirunindravur and Thiruvallur. It is one of the four national highways out of Chennai city, part of NH 716 and SH-U 148.
The road, however, is narrow with a width of 8–10 metres. Over 46,000 – 88,000 vehicles use the road every day. The morning Peak Hour per direction (PHPD) traffic of CTH road is 3400 – 7000 vehicles with Peak Hour share of 8%.