Tail turn-lamps aka blinkers on cars and light trucks. Talk about function over form. Boring. Rarely do they receive the amount of attention from designers as do front head-lamp assemblies. It makes little sense because, when you think about it, drivers spend more time in traffic ogling the derrieres of vehicles than their visages. And if our rear blinkers aren't up to snuff we can count on the horn honking from the motorist behind us to let us know.
But in an effort to earn the harder-to-come-by dollars of consumers in the recession more attention is being paid to the rear blinkers. As in the 2011 Ford Mustang GT (as well as all other Mustangs). Where they are fully sequential much like the road lane closure arrow signs. Truly unlike any other rear blinkers on the road [that we know of].
To borrow a quote from Jill Ciminillo's ChicagoNow "Drive, She Said" blog, "Too bad I can only see it when I am not driving it." http://www.chicagonow.com/blogs/drive-she-said/2010/12/todays-rave-toyota-avalon-taillight.html