Jeff
No need to cross the ocean, quad runners are street legal here just north of the border in Hasting County (from Lake Ontario up to Algonquin Park) in Ontario, Canada. 
The OPP (Ontario Provincial Police) found that they just couldn't catch'em so the local council made them legal. No they don't have license plates (tags) or turn signals so I don't know where a motorist stands if they colide with one. 
Larry

<<Date:    Sun, 21 Mar 2004 12:32:12 -0800
From:    Jeffrey Schwaia <jeff@TSSGI.COM>
Subject: Back from Germany

I just got back from Germany and have discovered the number one reason to
live in Germany... no, it doesn't have anything to do with T3's or
Vanagons... it's because quad runners are street legal in Germany!

I thought I was imagining things the first time I saw someone tootling down
the road on a quad, but sure as s**t I saw another, and it had a license
plate and turn signals.  Too cool!

Oh yeah, I saw a few cool T3 items as well.

Cheers,

Jeff>>