What are the weight requirements for deflection testing vehicles?

[CarmenAnn]

Deflection value refers to the magnitude of deformation in the roadbed/pavement before and after the application of load, measured in units of 1/100 millimeters. The calculated deflection value represents the weighted average of residual deformation in a specific road section, measured at 20-meter intervals, using vehicles with a specified axle load (typically rear-axle vehicles of 6 or 10 tons) before and after applying load to the roadbed/pavement. Heavier vehicles generally exhibit better high-speed stability. Factors affecting high-speed stability include: 1. Vehicle tires: Tires are the only components in contact with the ground. Generally, wider and flatter tires improve high-speed stability. 2. Vehicle shape: Aerodynamic designs enhance stability at high speeds. 3. Drive configuration: Most vehicles are front-wheel drive, rear-wheel drive, or four-wheel drive, with four-wheel drive offering superior stability compared to two-wheel drive. 4. Suspension system: Vehicles with independent suspension (such as MacPherson or multi-link independent suspension) are generally more stable than those with non-independent suspension systems.