GB/T 46417-2025

This standard specifies a test method for evaluating the stability of commercial vehicles, such as trucks and buses, during straight-line braking on a split-mu surface (where one side of the road has high friction and the other low friction). It is applied in vehicle development and type approval testing to assess how a vehicle maintains directional control and avoids spin-out or lane departure under asymmetric braking conditions. The standard ensures that commercial vehicles meet safety performance requirements for real-world scenarios like braking on icy or wet roads with varying traction.