What does G2 National Expressway mean in Subject 1?

[Jenkins]

G2 National Expressway refers to the Beijing-Shanghai National Expressway. Here is relevant information about national expressways: 1. Introduction: Based on their position in the road network, China's expressways are divided into national expressways and provincial expressways. National expressways are abbreviated as "National Express" and are marked with a red background and white characters on the upper banner; provincial expressways are abbreviated as "Provincial Express" (indicated by the abbreviation of the provincial administrative region on the signage) and are marked with a yellow background and black characters on the upper banner. 2. Precautions: According to the "Expressway Traffic Management Regulations," pedestrians, non-motor vehicles, tractors, agricultural transport vehicles, electric bicycles, wheeled special machinery vehicles, full-trailer tractors, and motor vehicles with a designed maximum speed below 70 kilometers per hour are prohibited from entering expressways.