There's a new illustration in the gallery answering the question Does It Work?
It's from the current issue of MAI magazine and finally gets into the print the "works on the boulevard" gag that springs to my mind whenever people talk about martial arts working on the street. What about working on the avenue, or the crescent? Maybe that's what crescent kicks are for. It's probably more appropriate to ask if the art works in an alley or a cul-de-sac. Those are the places where you're more likely to really need to know.
It only makes sense to say "it works on the street" if you're talking about a driving system. Otherwise . . . there are a lot of misguided martial artists out there at risk of being run over. Hey, people! If you're going to take your brawling outside, you should really be asking: does it work on the pavement? *
* sidewalk, for the American readers