With an average of three runway incursions each day in the United States, it’s always a good idea to regularly review airport signs and markings and regard airport surface operations with the same importance as any other phase of flight.
You can learn more on taking the mystery out of airport sign language in the article “How a Runway Earns Its Stripes” on page 12 of the Nov/Dec issue of FAA Safety Briefing. The article also has a full-page quick reference guide on airport signs and markings. http://www.faa.gov/news/safety_briefing/2011/media/NovDec2011.pdf