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The safety distanceis taken as 4m.
The result is consistent with the actual traffic conditions.
Jia: International Journal of Modern Physics C Vol. 19 (2008), p. 1321 [9] W.
Liu, Journal of Shanghai Jiaotong University (English Edition) Vol. 13 (2008), p. 166 [11] X.
Li: International Journal of Modern Physics C Vol. 22 (2011), p. 319 [14] W.

Based on many domestic and international research results, the paper utilizes General Polynomial Fit.vi in LabVIEW to make programming, as shown in fig 5.
In order to keep safety, the driver will slow the car down instinctively.
The safety analysis of driving on the continuously long downhill highways[J].
Journal of wuhan university of technology, 2008, 12(6):1013-1016 [9] GUO Weizhen, GUO Xingming, WAN Xiaoping.
China Journal of Highway and Transport, 2001, 14(4): 89- 90

Table 4 Risk rating matrix Consequences level Probability level slight larger serious Very serious catastrophic 1 2 3 4 5 very impossible 1 Ⅰ Ⅰ Ⅱ Ⅱ Ⅲ impossible 2 Ⅰ Ⅱ Ⅱ Ⅲ Ⅲ chance 3 Ⅱ Ⅱ Ⅲ Ⅲ Ⅳ possible 4 Ⅱ Ⅲ Ⅲ Ⅳ Ⅳ probably 5 Ⅲ Ⅲ Ⅳ Ⅳ Ⅳ Note: Guideline of tunnel risk management（International association of tunnel，2004）and Safety risk assessment guide for highway bridge and tunnel construction（Ministry of Transport of China，2011） Risk acceptance criteria.
Calculating the probability of safety risk on blasting construction.
Safety risk probability assessment mode is constructed on the basis of fuzzy comprehensive evaluation,.and further clear safety risk hierarchy of tunnel blasting operation.
References [1]P.Yin,Z.Ma:Highway traffic technology,Vol.12(2006), p.149–152(In Chinese) [2]Ministry of Transport:Safety risk assessment guide of highway bridge and tunnel construction.
(People's Traffic Press.Beijing.2011) (In Chinese) [3]J Tian:Chinese journal of safety science, Vol.19(2008), p.171 ~ 175 (In Chinese) [4]C.J.Wang,Q Xu:Chinese journal of safety science, Vol.11(2007), p.73 ~ 78 (In Chinese) [5]H.W Huang:Journal of underground space and engineering, Vol.2(2006), p.13-20 (In Chinese) [6]The report on safety risk assessment of Chen-Qin highway tunnel construction in Hebei.

Traffic-related pollution should be controlled by reducing use of motorized vehicles, fuel consumption of cars and pollutant emissions so as to promote traffic safety, improve environment, and protect public health.
Therefore, the dimension of quality of life is put forword in addition to the mentioned above, and the people-oriented indicators reflecting public health, traffic safety, and happiness should be come up with in the following research.
As for the economic sustainability, quantifiying the contribution of transportation on economic development is considered under the circumstances of traffic congestion, traffic safety and transport pollution.
Reprinted from the Harvard International Law Journal, Vol.14, No.3, 1973
(In Chinese) [23] WANG Wei, Journal of Southeast University, 2001, 31(3): 1~6.

Introduction At present, the adaptive cruise control (ACC) is a hotspot of the automobile active safety and intelligent transportation systems (ITS) research.
In order to matching the traffic flow ,it can control relative speed and distance on basis of the current driving conditions and environment in real-time, meanwhile it can effectively reduce the burden on the operation of the driver and improve the active safety of vehicle[1].
The performance of ACC was examined by introducing various traffic scenarios.
Li: Journal of Zhejiang University-Science A, Vol. 11 (2010) No.3, p.191
Cheng: International Journal of Automotive Technology, Vol. 13 (2012) No.1, p.77

,Kalsher,M.J.& Rashid,R, Effect of signal word and source attribution on judgments of warning credibility and compliance likelihood[J].International Journal of industrial Ergonomics. 24(2) (1999) 185-192 [2] Rogers,W.A., Lamson,N.& Rousseau,GK, Warning research:an integrative perspective[J].
International Journal of Psychophysiology. 41(l) (2001) 75-85
Journal of Experimental Social Psychology. 36(6) (2000) 660-676 [14] Cacioppo,J.T.
Journal of Consumer Psychology. 17(3) (2007) 184-187 [16] Wogalter,M.S.
[17] Rundmo,T.& Iversen,H, Risk Perception and driving behavior among adolescents in two Norwegian counties before and after a traffic safety campaign[J].

Nowadays automobiles are with good performance and comfortable; however, safety gradually becomes an issue because of high incidence of traffic accidents.
Except for occupants injured in traffic accidents, other vulnerable road users, like pedestrians, are also in danger.
Introduction and Literature Review Nowadays automobiles are with good performance and comfortable, however, traffic safety gradually becomes an issue because of high incidence of traffic accidents.
The new model can then be applied to relevant tests and development of pedestrian passive safety system.
Patrie, International Journal of Crashworthiness, 9(6) , 607-623, 2004

Transport journal, (2000). pp39,5
International journal of production research, (2005).
International journal of production research (2007).pp45
Safety science, (2009) pp47 [25] H.
Journal of Transport Geography (1999)

Increasing axle loads and traffic density made bridge accidents happened very often in China which caused the bridge safety assessment method in dire need.
As a method for bridge safety assessment, the structural reliability analysis is widely accepted.
Journal of Highway and Transportation Research and Development, 1999(04):21-24
Journal of Constructional Steel Research, 2007. 63(12):1561-1569
Application of system reliability to structural safety. in Proceedings, 4th International Conference - Applications of Statistics and Probability in Soil and Structural Engineering. 1983.

Most traffic accidents occur at unsignalized intersections, mainly due to inappropriate behavior of non-priority vehicles.
Therefore, Figure.2 shows traffic safety at umsignalized junctions should be improved by giving warning to drives at appropriate locations before junctions.
Japan Society of Traffic Engineers, 2006.
[3] Hideo YAMANAKA, Tetsuo MITANI “Safety assessment for unsignalized small intersections using vehicle behavior video analysis and evaluation of collision avoidance system”, Journal of The Eastern Asia Society of Transportation Studies, Vol.6 (CD-ROM),No195,2005,The 6th International Conference of EASTS,2005 [4] Hideo Yamanaka, Tetsuo Mitani and Ueda Makoto “Warning Timing Algorithm for A Stop Sign Control Assistance System at Small Junctions”, Proceedings ITS 14th World Congress on Intelligent Transport Systems, Beijing, China, Oct. 2007
Department of Transportation National Highway Traffic Safety Administration), “Junction Collision Avoidance Using Its Countermeasures”, 1999.