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Introduction Road traffic signs is an important road safety accessory facilities,it play an important role in mess- ging to regulate traffic behavior, indicating road conditions, security road efficacy, guide the pedest- rians and safe driving etc.
Traffic sign recognition system through the accurate and rapid detection to identify road traffic signs, and a good traffic sign recognition system can real- time send road traffic information to the driver, it will greatly help the driver make driving more safety and easy.
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Traffic congestion would lead to increasing travel delays, excess energy consumption, and decreasing traffic safety and reduced efficiency of transportation infrastructure.
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the water pipeline, electric, gas, traffic, communication and network etc..
The relation framework between the construction project safety and city public safety 3 Types of the City Public Safety Caused by the Construction Project Accidents and the Corresponding Case Analysis The main types of the city public safety caused by the construction project accidents include fire accident, collapse, city lifeline damage, traffic accidents etc..
· Beijing: The water and gas supply system are broke down because of construction under the international trade bridge in July.19,2010, which caused extremely bad social influence
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This technique of detecting abnormal events happen on the road can be applied in the transportation management to improve the safety of the traffic system.
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The number of deaths from road traffic accidents is among the top of the unnatural death, so how to improve traffic safety to reduce road traffic accidents has got widespread attention around the world.
Person, vehicle and road are three elements of traffic safety and should be safe and reliable for traffic safety.
Lane changing involves the three elements: person, vehicle and road and results in the changing of traffic safety, so it is necessary to make studies on vehicle safety trajectory of lane changing because they determine directly the result of lane changing.
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[15] ICAO, International standards and recommended practices AIR TRAFFIC SERVICES Air Traffic Control Service Flight Information Service Alerting Service, Annex 11to the Convention on International Civil Aviation [S].

The urban efficiency is severely affected by the deteriorative travel environment, increasing road traffic congestion and the traffic safety.
Therefore, to develop green traffic will enable the urban transport system development meet the common requirements, such as the environmental protection, energy savings, travel safety and efficiency.
In Copenhagen, the world’s first bicycle city appointed by the International Cycling Union, public bicycles become the newly remarkable symbol of city.
Canadian International Development Agency.
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And the research of wire rope safety barrier has reached a high level.
Acknowledgements The study is funded by the Open Fund of Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety(Changsha University of Science & Technology), Ministry of Education, and National Science and Technology Action Plan Project (2009BAG13A02), Beijing-Zhuhai double-line Changsha to Xiangtan Highway Resource-saving and Environment-friendly Technology Demonstration Projects (Traffic and Transport Department Traffic and Transport Letter Science and Technology [2009] NO.333), hereby thank.
International Symposium of Chinese Automotive Safety Technology(2006), in chinese
Journal of Highway and Transportation Research and Development(2006.7), in chinese
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Then various dynamic states of traffic appear and traffic jam may occur.
In realistic traffic management, is determined by traffic regulation.
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., Liuzhou, Guangxi, China afyli@tongji.edu.cn, btjovmxzy@yahoo.com.cn Keywords: Concrete bridge; Seamless broaden; crack; bridge serviceability; traffic safety Abstract.
(3) Reduce the driving danger because of the influence of traffic organization caused by the new carriageway, lightening the traffic management burden
The vertical displacement difference will directly influence the driving smooth and safety.
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