Traffic paints are the oldest and most widely used pavement marking materials in existence. Paint is a common pavement marking material used by TxDOT, although its use has recently declined as thermoplastic has become more popular. Paint still remains the most inexpensive of all pavement marking materials, although its cost has increased slightly as new formulations have been introduced. Paint is almost exclusively used for longline applications, often in maintenance projects, and is currently the only longline material applied by state forces.