Two typographers ( Pierre & Damien / plmd.me ) and a pro race pilot (Stef van Campenhoudt) collaborated to design a font with a car.
The car movements were tracked using a custom software, designed by interactive artist Zachary Lieberman. ( openframeworks.cc )

Here’s the video, When Driving Becomes Writing (iQ Font: The Making Of).

[youtube]Vwp4iOCECS8[/youtube]

I recall BMW doing something like it, but with paint. Here’s the video they released for the Z4.

[youtube]s80an8NHnHg[/youtube]

Meanwhile, you may download the iQ font here. You may also click on the following thumbnails to view the results: