A two axle automotive vehicle, with velocity of v (m/s) is moving up in a hill. Take W is the weight of the vehicle, G is the gradient, L is the wheel base, h is the height from CG to ground. 11and 12 are length from front axle to CG and from real axle to CG respectively. Considering aerodynamic resistance, rolling resistance and the gradient (G), derive static and dynamic braking axle loads equations for the given vehicle. Find the optimum braking performance including conditions for each axle lockup for the vehicle.