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Passage capacity of roundabout could not meet the increasing traffic demand at all so that traffic jam of roundabout crossing in each of the weekday peak periods is serious, which results in traffic disorder and frequent accidents.
Meantime, controlling traffic flow of roundabout with signal control shall be an effective method to solve traffic congestion. 2.
Mag., vo1.28, No.10, pp.42-53, 1990 [2] Xiaoguang Yang, Xiugng Li and Kun Xue, “A New Traffic-Signal Control for Modern Roundabouts,” Method and Application, Beijing University of Post and Telecom, vol. 4, pp.282–287, 2004 [3] Shuo-hao Liao, Yi-shan Liu, “Design and Application of Optimization Model for Traffic Roundabout,” Transport Engineering & Safety, vol. 2, pp.68-73, 2010,
Henrich, “Commodity profile with an emphasis on international trade: broccoli,” Agricultural Marketing Resource Center. pp.100-107, 2002 [6] C.
Chen, “Configuring Maps for A Satellite Communication Network By Self-Organization,” Journal of Neural Network Computing, vol.2, No.4, pp.11-17, 1991 [8] Dorigo M, Maniezzo V, Colorni. (1996).

Model's objective is minimizing the loss of delays due to meeting separation which is used to keep the safety of aircrafts before and afterwards.
Air traffic controllers apply rules, known as separation minima to do this.
Different separation minima exists between different category of aircrafts, which is recommended by the International Civil Aviation Organization (ICAO) as follows.
It just considers the safety interval between aircrafts before and after.
JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY, 2011(3):488-493

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.

Portable water-filled road barriers (PWFB) are roadside structures placed on temporary construction zones to separate work site from traffic.
Thiyahuddin, Gu Y.T, Thambiratnam D.P, Gover, R.B, "Safety enhancement of water-filled road safety barriers using interaction of composite materials " International Journal of Technology, vol. 4, p. 10, 2013
Gover, Thiyahuddin, M.I, Yan, C., Oloyede, A., Gu Y.T., , "Development of a combined FE/SPH model of a road safety barrier," presented at the 4th International Conference on Computational Methods (ICCM2012) Gold Coast, Australia, 2012
,Bedewi, N.,, et al., "Development and validation of a vehicle suspension finite element model for use in crash simulations," International Journal of Crashworthiness, vol. 9, pp. 565-576, 2004/11/01 2004
Thiyahuddin, Gu Y.T, Thambiratnam D.P, Gudimetla P.G, "Impact & energy absorption of road safety barriers by coupled SPH/FEM," International Journal of Protective Structures, vol. 3, p. 16, 11/09/2012 2012

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.

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.

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

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

,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].

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