To my surprise, I found myself thoroughly enjoying a bunch of websites on roads... Chris's British Road Directory (don't look at me for that "Chris's", it's in the page title :P the UK vs Italy page in particular amused the hell out of me) and Wet Roads in particular (though Pathetic Motorways is also good, if only for the photos of the lost A18(M) motorway).
(Links found via Metafilter.)

That Italy one's a bit fussy.