This chapter provides a detailed study of road marking maintenance vehicles, essential for ensuring clear and durable road markings. Firstly, it presents background information and current development trends in the industry. Secondly, the chapter explains the primary purposes and general introduction of these vehicles. Methods for road marking application and removal are described comprehensively, covering both established and innovative techniques. Typical products, including 18-ton road marking trucks and removal trucks, are introduced with their major features. Finally, the chapter covers common faults and troubleshooting methods, supported by practical reference tables, and offers guidance on vehicle selection for different operational scenarios.