This is not only for other drivers, but for pedestrian passers by and even potentially in photographs. If your company deals internationally then your vehicle decals could be seen across the world, or at least across the country.

Of course vehicle decals are not limited to use on your company cars either however, and they can also be used on your staff's private vehicles (and your own). This way if you times it by the number of staff you have, and consider how much driving they'll be doing, your brand will have made it across countless miles and probably always be in motion. Even in a front drive it will provide an advert. Of course some form of remuneration will be necessary in this case, and many companies offer to pay their staff's petrol, both as part of the deal, but also to encourage them to take long trips with your advertising attached to the side of their vehicle.