High-speed entrances and exits are the first pass to prevent the epidemic from being imported. Set up epidemic prevention and control checkpoints at highway intersections, strictly investigate passing vehicles, and resolutely build a "first barrier" for epidemic prevention and control.
Expressway, referred to as expressway for short, refers to the expressway dedicated to high-speed driving of automobiles. Expressway has different regulations in different countries and regions, different times and different scientific research and academic fields. Expressway is a multi-lane highway for cars to drive in different directions and lanes, and all access is controlled. The annual average daily design traffic volume in expressway should be above 15000 passenger cars, and the design speed is 80- 120km.