2007年10月11日18时40分,山东籍驾驶人吴某驾驶一辆车牌号为鲁L25322的重型大货车由龙岩往漳州行驶,行至漳龙高速公路溪长下坡路段时,由于未按高速公路上设置的警告标志要求挂低档行驶,导致刹车失灵车速失控,车辆追尾碰撞前方一辆中型厢式货车后,冲出路右护栏翻入坡底, At 11:40 on October 11, 2007, a driver of Shandong Province, Wu, was driving a heavy truck with a license plate number of L25322 and traveling from Longyan to Zhangzhou. When it reached the long downhill section of Zhanglong Expressway, Warning signs set up on the highway required to hang low gear, resulting in failure of the brake speed control, rear-end collision vehicles in front of a medium van, rushed out right guardrail into the bottom,