Great use of lines. Because my eye knows they're motion blur, it tends to zip along the line with the imagined movement, yet doesn't fly on out of the frame because there's another line to race it off in the other direction, all the way up the shot, but then bounded by the top, more static, lines.
I might have cropped more sky, since my eye feels like it should stop at the horizontal lines, but that may be just me :)
I'd love to know how you got the diagonals - very cool. Has a drifting kind of feel to it and in fact reminds me of a movie I saw pieces of about "drifting" - a style of driving youngsters were doing in Japan.