Setting up channel standards for provincial highways passing through villages

The first-class highway standard is no less than 20 meters for national roads, no less than 15 meters for provincial roads, no less than 10 meters for county roads, and no less than 5 meters for rural roads. According to the service functions of different roads, choose to retain at-level intersections or adopt full interchanges. The number of intersections will depend on the actual situation. There is a long central isolation belt to separate the incoming and outgoing vehicles. The minimum number of lanes is two-way four lanes, with six or eight two-way lanes being the most common. The driving speed limit is 60km/h-100km/h.