The first is the province
The second is high speed mileage (km)
The third is the area (10,000 square kilometers)
The fourth is the highway density (km / 100 square kilometers)
The fifth is the highway density
Generally speaking, in the case of the same straight line distance, the actual distance in the mountainous area will be more, because the mountain area has a large surface area and the terrain is undulating. You can see the density of the Henan highway from the map is not bad.
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