What load limit defines the requirement for a special permit for vehicles with metal tires?

The requirement for a special permit for vehicles with metal tires is set at a load limit of 5,000 pounds. This means that if a vehicle with metal tires exceeds this weight, it must obtain a special permit to operate legally on Texas roads. The regulation is in place primarily for safety reasons, as metal tires can cause more wear on road surfaces and may pose additional risks to other vehicles. By distinguishing this specific weight limit, the law aims to manage road safety and infrastructure health effectively.