Behind the wheel with RelayRides (video)

Look out, Zipcar--Relay Rides is mounting a big push to unseat the popular car-sharing company.

Move over, Zipcar. There's a new car-sharing service in town.

It's RelayRides, which is looking to cut into Zipcar's market share. Unlike Zipcar, where you rent from the company, Relay Rides sets you up to borrow a car from a person who lives near you. SmartPlanet talks to Shelby Clark, founder of the company about his business and how it works.

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