Mobile Promotions on autorickshaws

I found a very interesting and low cost promotion activity in Hyderabad. There are more than 1 lakh 3 wheeler autorickshaws ( Taxis ) in the city. On an average each taxi travel more than 100 KM on the busy roads of the city. A well designed 400 cm * 300 cm poster can be easily pasted on the backside of the auto and charges are so low just Rs. 50 i.e 1$ a month. For 100$ or Rs. 5000 one can promote their products on 100 taxis almost covering entire city, which is having a population of more than 7 millions. If one has to put a ad on a huge billboard it will cost more than Rs. 20000 a month and it will be located at one place and visblility is limited. A very low cost marketing and promotion tool for every one to try. one can contact synergyebiz@yahoo.com for promoting on taxis.