Be clear - send a clear and short message to your audience by keeping the message short and to the point. Clarity is extremely important - especially since traffic could be moving fast, and people need to focus on driving and can not take the time to read fine print. Be as concise as possible with direct information about who you are, what you do and how to reach you. The use of vinyl graphic on vehicles has proven to be very effective form of advertising with the least expense per impression. Sign Source Solution - The Power of Signage to Promote your Business.