The Kodaikanal Ghat Road has been designated by the Tamil Nadu State Highway Department as SH-156.

It begins at 10°9′10″N 77°41′30″E / 10.15278°N 77.69167°E / 10.15278; 77.69167 on the Grand Southern Trunk Road (NH-45), about 8 kilometres (5.0 mi) west of Batlagundu and ends at Kodaikanal with a length of 56.8 kilometres (35.3 mi).

[3] A retention wall was later built due to a landslide.

[5] In 2010, the road was completely blocked after a major landslide occurred due to heavy rainfall.

[6] In 2011, four people were killed when a car plunged into a gorge.