Nice take on the challenge. Too bad there is that red car going under the ramp. I like the selective desaturation, although it would have been better if you could have got rid of the brown and yellows too.
I think the desaturation works good here. Really makes the subject cards stand out nicely. I like that you did leave a little green and some yellow in the foreground trees and ground cover. Good luck with the challenge!
if they were racing wouldn't they be in different lanes? other than that, pretty nice picture.....except the tail lights on the suv in the background and the half-hidden truck are still clearly visible....