That would be the WOODWARD DREAM CRUISE. I don't think there is anything like it in the world. From Eight mile rd. almost to Pontiac, that's well over EIGHT MILES of classic cars lining Woodward Ave. for that one day event. (not to worry tho, things start building up in that area the entire week leading up to Saturday.)
Myself, I wouldn't be caught dead over there due to the traffic congestion so I just catch the news reports........but it is AWESOME!