What is the starting and ending sign of the expressway? ,

The distance marked is the end notice and the red line is the end. What is not marked with a red line is the starting point notice.

The following figure shows the stop sign of the expressway, but it is not an exit sign. This sign indicates that the expressway ends here, and the front belongs to the local highway. Some expressways are directly connected with local roads, but this is not an exit.

Precautions:

Although there are many types of vehicles, their structures are similar. This should be said to be the credit of standardization and the need of large-scale production line. With the development of society, the progress of science and technology and the change of demand, the appearance of railway vehicles has begun to change, especially passenger cars are no longer the same old faces. However, their basic structure has not changed significantly, and only certain parts have more scientific and advanced structural design.

Generally speaking, the basic structure of a vehicle consists of five parts: body, underframe, running gear, coupler buffer device and braking device.

The car body is the part of the vehicle carrying goods or passengers, and it is also the basis for installing and connecting other parts of the vehicle. The bodies of early vehicles were mostly wooden structures, supplemented by steel plates and bow bars. Modern automobile body is mainly steel structure or light metal structure.