See the sign factors
Besides the obvious factor of being placed where a sign is most visible to passing motorists, there are several other factors that carwash owners and operators should consider in order to have a more effective sign.
Illumination: Most businesses use illuminated signs to advertise their location and services at night. A sign that is easily seen at night can be critically important to the success of a business. Even when a business is closed for the night, it can benefit from the advertising impact of an illuminated sign.
Color Contrast: Visibility and color have been the subject of several studies, and nearly all of them have concluded that the background color and the color of lettering and symbols plays an important role in achieving optimum visibility, conspicuity and legibility of signage messages. Contrasting colors lend power to visual communications. For example, black letters on a yellow or white background is the optimum color combination to be legible from a distance, while light blue letters on a white background ranks much lower.
Monument Signs: If you are in a jurisdiction that only allows monument signs (ground signs usually four to eight feet), be advised that these kinds of signs can be easily obscured by bushes, parked vehicles, snowbanks, etc. Staff will require extra vigilance to ensure that your monument sign remains visible to passing motorists.