The challenge is only open to the first 100 people who sign up, and runs from August 1st to August 31st. Participants will receive $300 in Lyft credit (for shared rides only), $45 for Divvy Bike, $100 credit to Zipcar and a monthly pass for the "L" train and Chicago buses worth $105.

The aim of the program is to make it clear that urban dwellers have transportation options other than car ownership. According to Lyft, Chicago's denizens spend almost $13,000 per year on car ownership costs, yet only actually use their car 5 percent of the time. Those who sign up will need to prove they own a car.

It's certainly an interesting way to highlight the costs of owning a car (insurance, fuel, inspection, parking, repairs and more). As more and more people in urban areas are choosing not to buy cars, a move like this could convince people to get rid of the cars they already have.