Escape lane composition

Lane composition The emergency lane is mainly composed of approach lanes, braking lanes, service lanes and auxiliary facilities (roadside guardrails, anti-collision facilities, rescue anchors, emergency telephones, lighting), etc.

There are four main types of emergency escape lanes: uphill type, horizontal ramp type, downhill type and sand pile type.

For example, the Yaxi Expressway section of the Beijing-Kunming Expressway in Sichuan Province is the most dangerous expressway in the country, and the 51-kilometer long road from Tuowushan to Shimian is also called "the devil's road". "The Devil's Road" is almost all long downhill, which is rare among highways in Asia. It is also high in altitude, close to cliffs, and has many sharp turns, making it very dangerous for trucks.

Therefore, as many as six emergency escape lanes are set up on this section of the road, one every 10 kilometers or so, almost all near sharp turns and steep slopes, and one every four or five kilometers. Eye-catching signs inform you in advance of the distance to the emergency lane ahead.

Emergency lanes are mostly more than 100 meters long and 50 degrees. The ground is paved with many small pebbles, causing the wheels to sink in, increasing friction and slowing down the vehicle speed. According to rough estimates, about 30 trucks every year rush into the avoidance lane when the brakes fail, thus avoiding the tragedy of vehicle crash and death.

For example, in the early morning of June 20, 2016, when a truck was driving to the Liziping section of the Yaxi Expressway, its brakes suddenly failed. After sliding for three or four kilometers, the driver saw a sharp turn ahead. Rushed into the emergency lane next to it.

Due to the huge inertia, the truck rushed to the end of the more than 100-meter-long emergency lane and did not stop completely until the front of the truck was suspended in the air. The driver and the owner of the truck escaped from the door, which was like a Hollywood-style thrilling scene. .