This post is about a month old but it offers some simple tips on how to use remnant outdoor advertising:
Here are my observations:
Don’t overdesign – You’d think that if you’re making something 40 feet wide, it better look great. This isn’t the case for most billboards I notice.
Use big, sans-serif fonts – You have just a few seconds to get something across. A name, an idea, a feeling. If you need to use text, make sure people can read it.
Dark text on light backgrounds are the easiest to read. Avoid using a blue background, it blends in with the sky.