Thermoplastic road marking specification 498 requires a contractor who is well-versed in the application of these materials. It is crucial for the contractor to have experience in handling thermoplastic materials, ensuring that the road markings are durable and long-lasting. The contractor should also be knowledgeable about the specific requirements outlined in specification 498 to ensure compliance and quality of work. Hiring a contractor with expertise in thermoplastic road markings can help guarantee a successful and high-quality road marking project.