What does the sign as shown in the picture mean?

1, there is a black 40 in the middle of the black circle, and the black slash is "the speed sign of lifting the restriction".

2. There is a black 40 in the middle of the red circle, which is a "speed limit sign" with a speed limit of 40 km/h.

Extended data:

Road traffic signs are divided into main signs and auxiliary signs.

First of all, the main signs are divided into warning signs, prohibition signs, indicating signs, guiding signs, tourist signs and road construction safety signs.

1, warning sign

Play a warning role. * * * There are 49 kinds. Signs warn vehicles and pedestrians to pay attention to dangerous places. The color is yellow background, black edge and black pattern, and the shape is an equilateral triangle with the top angle up.

2. No sign

Play a role in prohibiting certain behaviors. * * * There are 43 kinds. Signs prohibiting or restricting the traffic behavior of vehicles and pedestrians. Except for individual signs, the colors are white background, red circle, red bar, black pattern and pattern layering; Vertices are circular, octagonal and downward equilateral triangles. Set in the road or near the intersection where it is necessary to prohibit or restrict the traffic behavior of vehicles and pedestrians.

3. Indicating signs

Play an indicative role. * * * There are 29 categories. Signs indicating the movement of vehicles and pedestrians. The colors are blue background and white pattern; The shape is divided into circle, rectangle and square; It is set near the road section or intersection where vehicles and pedestrians need to be guided.

4. Guiding signs

Play a guiding role. * * * There are 146 species. Signs conveying information of road direction, location and distance. Except for milestones and 100-meter piles, the colors are generally blue and white; Freeways are usually green and white patterns; Except for location identification signs, milestones and confluence signs, the shapes are usually rectangular and square. It is set near the road section or intersection where the direction, location and distance information of the road need to be transmitted.

5. Signs of tourist areas

* * * There are 17 categories. Provide signs of direction and distance of tourist attractions. The color is brown background and white character pattern; Shapes are rectangular and square. Tourist area signs can be divided into two categories: guiding signs and tourist symbols, which are set near road sections or intersections that need to indicate the direction and distance of tourist attractions.

6, road construction safety signs

Traffic signs in road construction areas. Used to remind drivers and pedestrians of vehicles to pay attention. * * * There are 26 kinds. Among them, there are 20 signs in the road construction area, which are used to announce the traffic jams and detours of expressways and general roads. Located in an appropriate position in front of road construction, maintenance and other sections.

The second is the auxiliary sign, which is a sign set to maintain traffic safety and smooth traffic when the main sign cannot fully express or indicate its content. They are rectangles with white background, black characters and black borders, and are attached to the main signs for auxiliary explanation.

References:

Baidu encyclopedia-traffic signs