Designed to prevent oversized trucks from accessing restricted areas, this R12-3 traffic sign provides critical guidance for vehicle height limitations. The sign meets both DOT and MUTCD state and federal standards, ensuring compliance and clear communication for drivers. Constructed on reflective aluminum standard punched blanks, the sign features a high-visibility graphic depicting a truck with a height restriction symbol. Available in high-intensity and diamond-grade materials, the sign delivers maximum legibility and durability in various environmental conditions. By clearly indicating maximum vehicle height allowances, this sign helps reduce potential structural damage and improve overall road safety.