What kinds of traffic obstacles are there?

Traffic guardrail can be divided into cement guardrail, steel guardrail, cast iron guardrail, plastic guardrail, plastic guardrail and stainless steel guardrail according to materials. Guardrails can be divided into central isolation guardrails, motor vehicle guardrails and non-motor vehicle guardrails, pedestrian guardrails and greening guardrails according to installation positions. In some cities, due to the limitation of economy and conditions, cement guardrail and steel guardrail are often used. However, due to the lack of detailed design, poor appearance and poor guardrail function, it also affects the urban environment. Some cities emphasize decoration, but ignore the inherent "safety" function of guardrail. For example, some cities use stainless steel guardrails, but do not pay attention to the optical design of guardrails, which brings light pollution and glare and affects safety; Some guardrail designs are not standardized, and the guardrail is too high, which affects the urban landscape; Some guardrails have no vertical spacers in the middle or the vertical spacers are too large, which makes it easy for pedestrians to drill through the guardrails, posing a safety hazard; Some guardrails have poor strength, and the separated connecting parts can be disassembled manually, which is easy to damage and fail; Some guardrails have many welding points, the bottom layer is not treated with anti-corrosion surface, and the surface is painted or dipped in plastic, which has low anti-corrosion ability, easy to rust and short service life. The main functions of traffic guardrail are: separation function: traffic guardrail separates the traffic of motor vehicles, non-motor vehicles and pedestrians, and vertically separates the roads on the road section, so that motor vehicles, non-motor vehicles and pedestrians can drive separately, which improves the safety of road traffic and improves the traffic order. Blocking function: Traffic barriers will block bad traffic behavior, and pedestrians or bicycles or motor vehicles try to cross the road. It requires the guardrail to have a certain height, a certain density (column) and a certain strength. Warning function: through installation, the outline of guardrail is concise and bright, warning drivers to pay attention to the existence of guardrail, pedestrians and non-motor vehicles, and preventing traffic accidents.