Why doesn't China City have such a slope design?

The maximum gradient of road design varies with road grade, design speed and regional conditions.

Generally speaking, the slope is limited according to the speed of the car. When the design speed is120km/h,100km/h, 80km/h, 60km/h, 40km/h, 30km/h and 20km/h, the limit value of the slope is 3% to 10%, and the snow and ice cover and.

Taking urban roads as an example, when the design speed is 20km/h, the maximum longitudinal slope is 9%, which can be increased to 10% after technical and economic demonstration. When the design speed is 20km/h, the maximum longitudinal slope of urban roads is 8%, which can be increased to 9% after technical and economic demonstration.

Different highway properties have different design requirements.

According to the picture you provided, it should be a city (main road). The design of this ramp is bold enough. This design requires considerable courage from relevant management units, which is quite rare in China.