How many lanes are there in Shanghai-Chongqing Expressway?

Generally, expressways are two-way and four-lane, and expressways around big cities are two-way and six-lane. The speed limit of the first lane is from 100 to 120 kilometers per hour, which is generally reserved for buses. The speed limit of the second lane is 80 to 100 km per hour; The speed limit of the third lane is 60 to 100 km; The fourth lane is the emergency lane. Expressway pavement includes main road, ramp and auxiliary road. The main lane is the roadway, and from left to right, it is set as overtaking lane, fast lane and slow lane. Ramps can be subdivided into interchange ramps, acceleration lanes, deceleration lanes, approach roads, distribution lanes and turning ramps. Auxiliary lanes include emergency lanes, U-turn lanes, climbing lanes, escape lanes and cooling lanes.

The three-lane speed limit of expressway is counted from the left, and the general speed limit is as follows:

The first lane: 100- 120km/h (overtaking lane)

The second lane: 90- 1 10 km/h (roadway)

The third lane: 60-100km/h (truck lane)

The fourth lane: emergency lane.

Of course, this is only the three-lane speed limit of the general expressway. If the highway section is a ramp and other special circumstances, there will be other speed limit regulations. The speed limit of the ramp is related to the length and angle of the ramp and the traffic flow, while the speed limit of the gate is 40 km/h. As for the curve on the expressway, there is generally no need to slow down, which is related to the design standard of the curve in China.

There are certain standards for the design of expressway bends. The minimum curve radius of expressway bend in plain or hilly area is 650m, and the minimum curve radius of expressway in mountainous area is 250m m. When the vehicle passes through the curve at 120km/h, the centrifugal force will not exceed 0.2g, while the centrifugal force that ordinary vehicles can bear is at least 0.5g, so there is no need to slow down. According to this design standard, if you want to use Xiaohao's stunt-whirlwind to charge a tornado on a high-speed curve, you should drive at least 250 km/h, but only high-end cars can do it. High-end cars can bear more centrifugal force, so you should drive faster.

The third paragraph of Article 78 of the Regulations for the Implementation of the Road Traffic Safety Law stipulates that if there are two lanes in the same direction, the minimum speed on the overtaking lane is 100 km; If there are more than three lanes in the same direction, the minimum speed of overtaking lane is110km, the minimum speed of lane is 90km, and the speed of deceleration lane is within 50km. If the speed indicated by the road speed limit sign is inconsistent with the lane speed mentioned above, drive at the speed indicated by the road speed limit sign.

Precautions:

When driving at a high speed, pay attention to the traffic signs, and do not drive beyond the speed indicated by the signs. In case of snow, rain, fog, slippery road surface, slippery ice and poor visibility, the vehicle speed should be reduced to below the safe speed in time, and the necessary safe distance should be kept. Do not drive too fast blindly. Don't accelerate overtaking at will and frequently, and don't overspeed to avoid danger.