National and provincial highway mileage data from 2001 to 2021
1. Time: 2001-2021
2. Indicator: highway mileage
3. Scope: Nationwide and 30 provinces and cities (excluding Tibet)
4. Source: Provincial NJ, Provincial TJGB, Tertiary Industry TJNJ (no missing)
5. Indicator explanation:
Expressway, referred to as expressway, refers to a road specially designed for high-speed driving of cars.
Expressways have different regulations in different countries, regions, different eras and different scientific research and academic fields.
According to China's "Technical Standards for Highway Engineering" (JTG B01-2014), expressways are multi-lane highways designed for cars to travel in separate directions and lanes, with all access controlled.
The annual average daily design traffic volume of the expressway should be more than 15,000 passenger cars, and the design speed is 80 to 120 kilometers per hour.
6. Download link:
https://download.csdn.net/download/m0_71334485/88202306