Science Monday: Dracula-esque congestion cameras will detect blood

New cameras have been unveiled in the UK, to try to enforce car-sharing lanes on roads. The new cameras send an infra-red beam through the windscreen, which apparently measure the amount of blood and water in the car, and therefore, how many people are in there. The idea is that it should identify people that use the car sharing lanes in cities like Birmingham and Leeds, when they're the only person in the car, as well as the really sneaky ones who pose mannequins in their passenger seats (people do this?).

Questions that immediately spring to mind include 'what if the passengers aren't viewable from the windscreen', 'what if you've got a really, really big person' and 'is this a wind-up'. Still, it sounds fancy.

[via Daily Mail]