Difference between high-speed contour line and traditional contour line

High-speed rail is short for high-speed railway. The tracks of high-speed rail are generally separated, similar to high-speed, and most of them are erected by interchanges. The speed is generally above 300 kilometers per hour. There may also be some lower parts.

EMU is a train in which trains and trailers are inserted in a certain order, for example, a train with two trailers and a train with two trailers, so that the train speed can be very fast. The speed is generally a little over 200.

There are one or two moving cars in front of the ordinary train and a row of trailers behind it, which is slow. Fast means that there are only big stops on the way, and the local train just stops, which is slower!

Expressway refers to an expressway that can adapt to the daily passenger car traffic of more than 25,000 vehicles, and is designed for cars to drive at high speed in a single lane, and all access is controlled. "Generally, it can adapt to the speed above 1.20km/h, requiring a flat route, a gentle longitudinal slope and a pavement width of more than four lanes. There is an isolation belt in the middle, using asphalt concrete or cement concrete advanced pavement, and equipped with complete signs, markings, signals and lighting devices to ensure driving safety; It is forbidden for pedestrians and non-motor vehicles to walk on the road and use interchanges, footbridges or tunnels to pass with other lines;

High-grade highways: highways are generally classified into first-class highways, second-class highways, third-class highways and fourth-class highways; There are various introductions in the encyclopedia, so you can check them yourself.

National roads, provincial roads, county roads and township roads are divided according to administrative levels, and Baidu Encyclopedia has its own introduction.