Route
MDR 170 runs 59 km from Kodaikanal, Tamil Nadu to Marayoor, Kerala.
Crosses Tamil Nadu and Kerala.
Through Kodaikanal and Marayoor.
Why it matters
MDR 170, Kodaikanal–Marayoor District road, crosses the border between Tamil Nadu and Kerala. A state road that runs through more than one state has no single owner — TN Highways and Kerala PWD each maintain the stretch inside their own state, so which department to contact depends on where along the road you are.