PAVEMENT MARKINGS GO RELATIVELY UNNOTICED by most people but affect almost everyone every day. They are used not only on city streets, highways, and interstates but also at airports, parking lots, and many commercial and industrial sites. A variety of materials are used for these applications. Some have specific uses, but all must adhere to the surface on which they are applied, show resistance to abrasion and weathering, and perform adequately over their expected life-times [1]. The following discussion will focus on the different types of marking materials being used and the testing of these materials for acceptability.