Metroshuttle - grinding the city to a halt?

The folks over at B3ta.com are best known for doing things like Photoshopping movie posters to look like they're advertising cat food, but one of the keen-eyed people on their forum has brought up a good point about the Manchester Metroshuttle posters.  Take a look at the photo below and you'll notice there's no way those cog wheels could actually turn!

Either the art department at GMPTE have a limited knowledge of engineering or they're making a veiled reference to city centre traffic levels at 5pm.  Have a look here for the full B3ta forum thread.

Thanks to James for telling us about this.