How many kilometers plus how many meters to distinguish the expressway, how do you know the approximate location distinction?

The sign of expressway is based on the exit of toll station. A sign tells you that you are 80 kilometers away from Nanjing, which means that your current position is 80 kilometers away from Nanjing exit.

Including some tourist attractions, a sign on the expressway tells you that it is still 1.5 kilometers away from Huangshan Scenic Area, which means that if you want to visit Huangshan Mountain, you will go down the mountain after 1.5 kilometers. As for which direction and how far to go to Huangshan parking lot after going down, this brand doesn't matter.

Most of the kilometers marked on these signs are approximate, and the upper and lower errors can be hundreds of meters, some of which can only be used as comfort figures. Every time each road is rebuilt, the signs on the previous road are generally rebuilt in different periods. Inner Mongolia, Xinjiang, Qinghai, Heilongjiang and other major provinces and regions also have signs that differ from the actual distance by 5- 10 km.

Just look around and don't pay too much attention to these details.