I think this campaign from Transport for London is fantastic.
I love that everything is parallel, the bike is behind the vehicle and the road edge extends to the full width of the poster. It looks like there's no danger, so you have to use your imagination to make sense of the caption.
I also suspect that the campaign is not really aimed at drivers.
By the way, if you can't see the picture, try a different browser! I've been moving away from bitmap images to SVG (vector graphics), to support high-resolution devices. I've updated most of my previous posts with SVG versions of the pictures. My assumption is that most people who read my blog will have a modern browser.