What are the five threats to human life?

1. In modern society, the main threats to human life are heart disease, cancer, sudden illness (stroke), pneumonia and road traffic accidents. Road traffic accidents rank fifth among the five major factors, accounting for 1% of all deaths.

2. There are "four principles" in traffic: traffic should be separated; Traffic should be continuous; The traffic flow is divided equally, and the total traffic volume is reduced.

3.( 1) Set up fake traffic police (solid traffic police model) in some accident-prone sections in China.

(2) There is a downhill bend somewhere in Japan, and accidents often happen because the driver drives too fast. Police and speed monitoring have no effect and accidents occur frequently. Later, experts suggested drawing some horizontal lines on the curve, and the problem was solved.

4. Road language refers to traffic markings, signs, traffic signs and traffic signals on the road, and also includes physical channelization facilities such as traffic islands, isolation belts and fences. "Road talk" has the characteristics of being easy to understand, direct, simple, clear and continuous.

5. The standardization, perfection and scientification of road language is the most important symbol of the modernization of urban traffic management.

6. List the figures and compare them. By comparing the figures with foreign cities, it shows that there are too few urban road languages in China, which greatly affects the function and efficiency of existing traffic facilities.

7. "Traffic Microcirculation" refers to hutongs, alleys, narrow streets, service roads and other roads outside the main road network. The reason why "traffic microcirculation" can't attract people's attention is because the roads are narrow, complicated or difficult to manage. When the road language enters the "traffic microcirculation", it can eliminate physical obstacles, dredge the microcirculation network and achieve the purpose of shunting the trunk road network.