The StreetWriter can be described as a huge dot-matrix printer that prints text messageson the ground. The printer unit is mounted in a trailer so that when itis a dragged by a car it is able to print extremely long messages.

Theprinter consists of a custom built spray painting unit, which iscontrolled by a computer. Apart from text messages it can also printsimple graphics in the same manner as an old dot-matrix printer. Thesemessages and graphics are so large, that they can be seen from planesand tall buildings.

Source: appliedautonomy.comAdded: 3 October 2007