Last year, 300 folks across North America turned in their car keys for a month as part of the 2008 Zipcar Low-Car Diet. And, in addition to cutting congestion, they also walked 85% more, biked 136% more and decreased their miles driven by 71%. Pretty impressive, eh? Starting July 15, a new crop of participants from all Zipcar cities worldwide* will begin the 2009 Low-Car Diet: one full month of living without a primary car.

Zipcar will be selecting 30 participants in each Zipcar metro to take part in the 2009 Low-Car Diet. Zipcar and its partners are committed to providing all participants with the necessary tools for creating transportation nirvana, including:

• Bike rentals
• Transit passes
• Complimentary meals at participating restaurants
• Discounts at local retailers
• And, of course, a 1-year Zipcar membership with some driving credit to get started

There will be a number of applicants for only 30 spaces, and Zipcar would like to make sure they’re the best. If you think you’d like to try an unconventional diet just fill out this short survey.

*Zipcar cities include Atlanta, Boston, Chicago, London, New York City, Philadelphia, Pittsburgh, Portland, San Francisco, Seattle, Toronto, Vancouver, and Washington, DC.

Photo Courtesy tvol via Flickr under Creative Commons license.

Disclaimer: Gas2.0 parent company Virgance is participating in the Low-Car Diet.