For the first time, passenger train exterior was used as medium for a political campaign during the 2016 Assembly elections in Kerala. Nagercoil-Mangalore Ernad Express on Southern Railway was the first train to be branded with the Left Democratic Front (LDF) election campaign from March 31, 2016. It featured the LDF campaign slogan in Malayalam, ‘LDF Varum, Ellam Sariyakum’ (LDF will come, set everything right) along with images of its leaders. Later, a few other trains also featured similar advertisements.
The project was executed by Black & White Creations Pvt Ltd, a leading railway advertising agency based in Kochi, Kerala.