How to inquire about national or provincial roads?

The high speed on the map is marked with thick yellow lines, numbered GXX, such as G25, and the number after G is two digits. The national highway is marked with thick black lines, numbered GXXX, such as G3 18, and the number after G is three, which is pronounced as 3 18 National Highway.

The dart is marked with a thin black line, numbered SXXX. For example, S205, the number after S is three, which is read as 205 darts. This national highway and provincial highway can be viewed by navigation software, and attention should be paid to distinguishing these signs.

Extended data:

When driving on national or provincial roads in rainy days, the speed should be strictly controlled. Because the road surface is wet and slippery, the braking efficiency decreases, so the vehicle speed should not be too fast, and a necessary safe distance should be kept from the vehicle in front. Especially when driving on expressway, it is necessary to appropriately lengthen the distance between the front and rear cars.

In addition, in rainy and foggy days, roads are often slippery. Overtaking is strictly prohibited at this time. Just keep the original lane running normally. In foggy days, visibility is low. If you need to brake, you can slowly relax the accelerator and lightly step on the brakes several times in a row to control the speed and prevent the rear-end collision.

In addition, the visibility is low in rainy and foggy days, and the correct use of car lights can remind the opposite and front and rear vehicles. The specific method is rainy and foggy weather. Because visibility is very low, turn on the front and rear fog lights and emergency lights to let other vehicles find themselves.