The 1,000km (590-mile) race, which kicked off in Madras (Chennai), will end in Kanyakumari, the southern-most tip of India, on 27 August.
Colourfully named teams like Tamil Devils" and Curry in a Hurry will get a first-hand experience of Indian roads.
Participants come from as far as the UK, US, Hungary, Armenia and Russia.
The Indian Auto-rickshaw Challenge is strictly fun, without any prize at the end of the race, the organisers say.
Technorati Tags
News US Health UK