Because of the limits of the structure and the energy region is finity, the cab of flat truck usually has many problems, such as too large deflection, occupant hurts, and so on.

• 平头商用车由于其驾驶室结构的限制，发生正面碰撞时吸能区域有限，经常出现由于驾驶室机构变形量过大，对车内乘员造成伤害，所以商用车驾驶室的安全强度更应得到足够重视。