The Kodaikanal Ghat Road has been designated by the Tamil Nadu State Highway Department as SH-156. It begins at (10°9′10″N77°41′30″E) 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).