What is the highway grade standard in China? How many levels are there?

what is the highway grade standard in China? How many levels are there?

according to the nature of use, highways can be divided into five administrative levels: national highways, provincial highways, county highways and township highways (referred to as national, provincial and township highways for short) and special highways. Generally, national highways and provincial highways are called trunk lines, and county roads and township roads are called branch lines.

highways are divided into five grades according to their functions and adaptive traffic volume: expressways, first-class highways, second-class highways, third-class highways and fourth-class highways. Among them, the expressway is a multi-lane highway for cars to drive in different directions and lanes, and all access should be controlled; ? According to the type of pavement, there are high-grade, second-high-grade, intermediate-grade and low-grade expressways. It is of great political and economic significance. It is a trunk road specially designed for cars to drive in different directions and lanes, and all the access is controlled. Divided into four-lane, six-lane and eight-lane expressways. Generally, it can adapt to the annual average day and night traffic volume of more than 25, cars converted into passenger cars.

first-class highway-a highway connecting important political and economic centers, leading to key industrial and mining areas, ports and airports, which is used for cars to drive separately and partially control access. Generally speaking, it can adapt to the annual average day and night traffic volume of passenger cars converted from various cars is 15,-3,.

secondary roads-roads connecting political and economic centers or large mining areas, ports, airports and other places. Generally speaking, it can adapt to the conversion of various vehicles into medium-sized trucks, and the annual average day and night traffic volume is 3-75 vehicles.

class iii highway-? For the communication of highways in cities above the county level. Generally, it can be adapted to convert various vehicles into medium-sized trucks, and the annual average day and night traffic volume is 1-4 vehicles.

Class IV highway-a highway connecting counties, townships (towns) and villages. Generally, it can be adapted to convert various vehicles into medium-sized trucks. The annual average day and night traffic volume is less than 1,5 vehicles in two lanes and less than 2 vehicles in one lane.

national highway (national highway)-refers to the main trunk highways with national political and economic significance, including important international highways and national defense highways, highways connecting the capital with the capitals of provinces, autonomous regions and municipalities directly under the central government, trunk highways connecting major economic centers, port hubs, commodity production bases and strategic locations.

provincial highway (provincial highway)-refers to the trunk highway which has the political and economic significance of the whole province (autonomous regions and municipalities directly under the central government), connects cities and important areas and does not belong to the national highway.

county highway (county road)-refers to the highway that has the political and economic significance of the county (county-level city) and connects the county with the main townships (towns) and major commodity production and distribution centers in the county, as well as the inter-county highway that does not belong to the national highway or provincial highway.

township roads (township roads)-refer to roads that mainly serve the economy, culture and administration of townships (towns) and villages, as well as roads that do not belong to highways above the county level and communicate between townships and between townships and the outside.

special highway-refers to the highway that is used exclusively or mainly for factories, mines, forest areas, farms, oil fields, tourist areas, military sites and other external communication.

high-grade-asphalt concrete pavement or cement concrete pavement.

second order-asphalt penetration or pavement asphalt macadam pavement.

intermediate-gravel pavement.

low order-mud-bound gravel or dirt road. China's highway grade is divided into ().

according to the political, economic and national defense significance and nature of use, highways are divided into five administrative levels

1. National highways (national highways), 2 provincial highways (provincial highways), 3 county highways (county highways), 4 township highways (township highways) and 5 special highways. What are the highway levels in China? What is the specific grading standard?

1. It is of great political and economic significance for highways to be divided into five grades according to their tasks, functions and adaptive traffic volume. It is a trunk road specially designed for cars to drive in different directions and lanes, and all the access is controlled. Divided into four-lane, six-lane and eight-lane expressways. Generally, it can adapt to the annual average day and night traffic volume of more than 25, cars converted into passenger cars.

the first-class highway is a highway connecting important political and economic centers, leading to key industrial and mining areas, ports and airports, which is specially used for cars to drive separately and partially control access. Generally speaking, it can adapt to the annual average day and night traffic volume of passenger cars converted from various cars is 15,-3,.

secondary roads are roads connecting political and economic centers or large mining areas, ports, airports and other places. Generally speaking, it can adapt to the conversion of various vehicles into medium-sized trucks, and the annual average day and night traffic volume is 3-75 vehicles.

Class III highway is a highway connecting cities above the county level. Generally, it can be adapted to convert various vehicles into medium-sized trucks, and the annual average day and night traffic volume is 1-4 vehicles.

Class IV highway is a highway connecting counties, townships (towns) and villages. Generally, it can be adapted to convert various vehicles into medium-sized trucks. The annual average day and night traffic volume is less than 1,5 vehicles in two lanes and less than 2 vehicles in one lane.

II. Highways are divided into five administrative levels according to their political, economic and national defense significance and nature of use.

National highways refer to major trunk highways with national political and economic significance, including important international highways and national defense highways, highways connecting the capital with the capitals of provinces, autonomous regions and municipalities directly under the Central Government, and trunk highways connecting major economic centers, port hubs, commodity production bases and strategic locations.

provincial highway (provincial highway) refers to the trunk highway which has the political and economic significance of the whole province (autonomous regions and municipalities directly under the central government), connects cities and important areas and does not belong to the national highway.

county highway (county road) refers to the highway that has the political and economic significance of the county (county-level city) and connects the county with the main townships (towns) and major commodity production and distribution centers in the county, as well as the inter-county highway that does not belong to the national highway or provincial highway.

township roads (township roads) refer to roads that mainly serve the economy, culture and administration of townships (towns) and villages, as well as roads that do not belong to highways above the county level and that communicate with the outside.

special roads refer to roads that are used exclusively or mainly for factories, mines, forest areas, farms, oil fields, tourist areas, military sites and other external contacts.

third, the pavement grade is divided into high-order, second-order, intermediate and low-order

high-order asphalt concrete pavement or cement concrete pavement according to the surface type.

sub-high order asphalt penetration or pavement asphalt macadam pavement.

intermediate sand and gravel pavement.

low-grade mud-bound macadam or dirt road. What grades does the 14th edition of Technical Standard for Highway Engineering classify China's highways?

according to the current traffic industry standard JTGB1-214 "technical standard for highway engineering", it is divided into five grades: expressway, first-class highway, second-class highway, third-class highway and fourth-class highway. Classification standard of mountain roads

Roads are divided into five grades: expressway, first-class highway, second-class highway, third-class highway and fourth-class highway according to their tasks, functions and adaptive traffic volume. High-speed colored asphalt highway is a trunk highway specially designed for cars to drive in different directions and lanes, and all the access is controlled. Four-lane expressway can generally adapt to the long-term design life of converting various cars into passenger cars, and the annual average day and night traffic volume is 25 ~ 55 vehicles; The six-lane expressway can generally adapt to the long-term design life of converting various cars into passenger cars, and the annual average day and night traffic volume is 45, ~ 8, vehicles; Eight-lane expressway can generally adapt to the long-term design life of 6, ~ 1, vehicles converted into adult buses according to various vehicles. Other highways are trunk highways, distribution highways and local highways except expressways, which are divided into four grades.

the first-class highway is a road for cars to drive in different directions and lanes, and mineral fibers can generally adapt to the long-term design life of converting various cars into passenger cars, with an average annual day-and-night traffic volume of 1,5-3, vehicles.

Secondary roads can generally adapt to the long-term design life of converting various vehicles into medium-sized trucks, and the annual average day and night traffic volume is 3, ~ 7,5 vehicles.

Class III highways are generally suitable for converting various vehicles into medium-sized trucks. The annual average day and night traffic volume is 1, ~ 4, vehicles.

Class-4 highways can generally adapt to the long-term design period of converting various vehicles into medium-sized trucks. The annual average day and night traffic volume is: less than 1,5 vehicles in two lanes; Less than 2 vehicles in a single lane. The selection of polyester fiber highway grade should be based on the planning of highway network, starting from the whole region, and comprehensively determined according to the use task, function and prospective traffic volume of the highway.

for a highway, different vehicle fatigue numbers or different highway grades can be adopted by sections according to traffic volume and other conditions. Long-term design of highways at all levels: 2 years for expressways and first-class highways; The secondary highway is 15 years; Wood fiber third-class highway is 1 years; Four-grade highway is generally 1 years, which can be adjusted according to the actual situation. For existing roads that do not meet the requirements of this standard, they should be rebuilt in a planned way according to the needs and possible principles and the development plan of the highway network, so as to improve the traffic capacity and use quality, so as to meet the requirements of the relevant grade highway standards. Classification of highways in China

There are still some highways, first-class highways, second-class highways, third-class highways and fourth-class highways that are not included in the specification, and the classification is based on the function of roads and the adaptive traffic volume (annual average daily traffic volume). The classification of highways in the United States

is divided into three levels: urban highways, inter-city highways and interstate highways.