Do you have the option of taking public transportation or riding a bike to work, but still choose to drive for personal reasons? The D.C. Council is asking people like you to pledge to give up your car for just one day tomorrow, Tuesday, Sept. 18, for its first annual Car Free D.C. Day. If you’d like to take the Car Free Pledge, head over to Ward 6 Council member Tommy Wells’ site to sign up to participate in Car Free D.C. Day. You can also pledge to participate in World Car Free Day (Sept. 22) and Car Free Week (Sept. 16-22) with the same form.

Since you’re the kind of person who chooses to drive even though you don’t have to, we’re sure you’re asking yourself, what’s in it for me besides the smug self-satisfaction of being a once-a-year do gooder? Why, all kinds of free stuff, that’s what! First there’s the Flickr contest (tag your photos from the day’s events with “DC Car Free Day”), which makes you eligible for a Car Free Day t-shirt autographed by Mayor Fenty and all the Council members. Plus there’s a host of free walking tours and a ’90s throwback in the form of a free inline skating lesson from the Washington Area Roadskaters. To top it all off, Bike the Sites is offering a deal on Tuesday only of $15 all-day rentals in honor of Car Free D.C. Day.

The Council is also hosting a World Car Free Day event on Sept. 22 on 17th Street NW between P and Q Streets, where information booths will be set up to help people learn about options for making a car free commitment more long term. Do you think you’ll participate? Let us know how in the comments.