State Highway 15 (Tamil Nadu) (SH-15) is a State Highway maintained by the Highways Department of Government of Tamil Nadu. It connects Erode with Udagamandalam (Ooty) in the western part of Tamil Nadu.
The total length of the SH-15 is 161.6 km.
Route: Erode- Gobichettipalayam - Sathyamangalam - Mettupalayam - Kotagiri - Udagamandalam
The Mettupalayam-Kotagiri section is also known as Kotagiri Ghat Road. It is one of the five Nilgiri Ghat Roads.
The highway passes through the following places:
The highway meets the following arterial roads along the way: