What do "inner ring and outer ring" mean respectively?

The inner ring is an elevated expressway in the besieged city.

The outer ring is an expressway or expressway outside the besieged city.

First of all, we should know that the so-called inner ring is an elevated expressway in the besieged area, with a speed of 60-80km/h generally, and there are many commercial vehicles in the urban area. The outer ring is an expressway or expressway outside the besieged city, and the speed is generally 60- 100km/h, which is convenient for vehicles to pass through the city. But the inner and outer rings are connected, and these roads are generally free.

Regarding the inner ring and outer ring, take Beijing as an example. The inner ring is the bus line in Beijing Ring Road, and the outer ring is the bus line outside the ring road. The ring road in Beijing is relatively long, so it is called inner ring and outer ring. Take the Third Ring Road as an example. If you go from Liuliqiao to Madian, take the inner ring, which is closer. If it is from Liuliqiao to Panjiayuan, the outer ring is more suitable.

The rules for distinguishing and dividing the inner ring and the outer ring of a city are generally divided by the highway ring around the city center, and the nearest ring is the inner ring. The second circle inside is the center. The third circle is the outer ring. Like a runway.

In addition, the inner ring runs from east to south, from south to west, from west to north, and from north to east. The outer ring goes from east to north, north to west, west to south and south to east in turn.

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