4.1.2.3 The distance between the rear axle of motor vehicle and front axle of trailer shall not be less than 3.00m (except the hauling mid-axle trailer).
4.1.2.4 Motor vehicle and automobile train (not counting in the projecting part of special device with operation functions) must be able to pass through the same vehicle clearance circle; the excircle diameter of vehicle clearance circle D1 is 25.00m and the inner circle diameter of vehicle clearance circle D2 is 10.60m.Where the motor vehicle and automobile train transit from the straight-line running to the above-mentioned circular motion, the value (vehicle out value) T of any part exceeding the vertical plane of vehicle lateral surface in the straight-line running shall not be greater than 0.80m (the vehicle out value T of single-hinged bus shall not be greater than 1.20m); measuring method is detailed in Appendix A.
