Everyday 41.7 Million people commutes to work in 15 largest US metro area, wasting 52 hrs and $1082 a year due to congestion. The situation will likely get worse unless significant number of cars are taken off the roads. At GreenMiles we provide solution to make carpool credible alternative for commuting. We simplify process of finding and arranging carpool; trip management and validation; and CO2 and financial accounting for the commuters.