What does G S X Y Z C D mean on the road above ground?

g？ s？ x？ y？ z？ c？ D stands for: G- national road, S- provincial road, X- county road, Y- township road, Z- dedicated road, C- village road and D- city road.

According to the national standard GB/T 9 17-2009, it has been marked.

See the figure below:

The road signs of China, provinces, counties and special roads all use pinyin initials, but the initials of township roads are duplicated with county roads, so it is changed to Y, which is strict in specification. It has been stated in Article 5. 1. 1 that "mainly" is marked with Chinese letters.

1, G—— National highway refers to the main trunk highway with national political and economic significance. ?

(1) definition of national highway: it refers to the main trunk highway with national political and economic significance. Including important international highways, national defense highways, highways connecting the capital with the capitals of provinces, autonomous regions and municipalities directly under the Central Government, and highways connecting major economic centers, port hubs, commodity production bases and strategic locations. ?

(2)No. of national highway: No.0, 1, No.2 and No.3 are adopted and divided into four roads. One is radial, and these expressways are sorted with "1" as the beginning; The second category is the north-south direction, starting with the word "2"; The third category is east-west, starting with "3", and the fourth category is "five vertical and seven horizontal" trunk lines, starting with "0". ?

2.s- provincial highway?

(1) provincial highway definition: also known as provincial trunk highway. In the provincial highway network, it has provincial political, economic and national defense significance, and has been determined as a provincial trunk highway by the unified planning of provinces, municipalities and autonomous regions. The competent departments of highways in the whole province (autonomous regions and municipalities directly under the Central Government) are responsible for construction, maintenance and management. ?

(2) Provincial highway number: compiled within the provincial administrative region. The number of the dart radiation consists of the dart identifier "S", the radiation identifier "1" and a two-digit serial number, such as S120; ; The number of the north-south longitudinal line consists of the provincial road sign "S", the north-south longitudinal line sign "2" (even number) and a two-digit serial number, such as S20 1, which indicates the north-south provincial road in the province; The serial number of the dart-saving dart is composed of the dart-saving identifier "S", the dart-saving identifier "3" (odd number) and a two-digit serial number, such as S30 1, which refers to the dart-saving dart in this province. ?

3.x County Highway

(1) definition of county road: it refers to the county (county-level city) with political and economic significance, connecting the county with major townships (towns) and other major places in the county. ?

(2) County road number: generally starts with the capital letter X, such as county road X3 12 line and county road X233 line. ?

4.y township road?

(1) Definition of rural roads: refers to rural roads, with a general width of about 3M, which is the guarantee for rural access to all points. Roads that mainly serve the internal economy, culture and administration of townships (towns), as well as roads that do not belong to the county level or above and between townships and between townships and the outside. ? Note: Rural roads include county roads, township roads and village roads. So rural roads belong to rural roads, including rural roads, and rural roads are not equal to rural roads. ?

(2) Township Road Number: starts with the capital letter Y, followed by three digits, such as Y794 and Y342.

5. Z-Special Highway

(1) Definition of special highway: Roads invested and built by industrial, mining, agriculture and forestry departments and mainly used by their own departments are called factory and mine roads and forest roads respectively. ?

(2) Factory-mine highway is a special highway built for the production, transportation and production process of factories and mines, which is usually divided into three types: off-site highway, on-site highway and open-pit mine highway. ?

(3) The forest road is a road built in the forest area to serve the development of forestry, which constitutes the forest road network in the forest area. ?

(4) Special highway number: generally starts with the capital letter Y, such as Y3 12 line.

6.d- urban roads

(1) Definition of urban road: a road that reaches all areas of the city, is used by traffic and pedestrians in the city, facilitates residents' life, work and cultural and recreational activities, and is connected with the roads outside the city to bear the burden of external traffic. According to the position and traffic function of roads in urban road system, they are divided into: ① expressway, ② main road, ③ secondary road and ④ branch road. ?

(2) According to the relevant provisions of the Interim Provisions on Urban Planning Quota Indicators, roads are divided into four grades. The total width of the first-class highway is 40~70 meters, and the design speed is 60~80 km/h. When the first-class highway crosses other roads, a grade separation should be set up. ? The total width of the second-class highway is 30-60m, and the design speed is 40-60km/h. The third-class highway has a total width of 20-40m, and the design speed is 30-40km/h. The fourth-class highway has a total width of16-30, and the design speed is less than 30km/h. ..