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Light gasoline cars take up 95% of the traffic.
It can be seen from Fig.3 that the effect of traffic density on maximum CO concentration is approximately linear under normal traffic operation.
Šimák: Process Model and Implementation the Multivariable ModelPredictive Control to Ventilation System, SAMI 2010-8th IEEE International Symposium on Applied Machine Intelligence and Informatics, January 28-30, 2010, Slovakia
Brandt: On Longitudinal Ventilation and Congested Traffic, International Conference “Tunnel Safety and Ventilation”, 2004, Graz
Gao: Study of the Principle and Computational Method of Road Tunnel Ventilation Using Jet Fans, Journal of Lanzhou Railway College, Vol. 8:4(1989),p.14-22

FA-based Optimal Strategy of Train’s Energy Saving with Energy Materials Hui Hu1, 2,a 1 East China Jiaotong University, Nanchang 330013, P.R.China 2 State Key Laboratory of Rail Traffic Control and safety, Beijing Jiaotong University, Beijing 100044, P.R.China ahh24895@163.com Keywords: Energy Saving, Optimal Strategy, Firefly Algorithm, Comparison Analysis;Energy Materials Abstract.
Acknowledgments Thanks for National High Technology Research and Development Program (2011AA110502); State Key Laboratory of Rail Traffic Control and Safety of Beijing Jiaotong University (RCS2010ZZ001). .
Clem: submitted to Journal of Materials Research (2003) [5] Fu Yinping.
Yang, Firefly algorithm, stochastic test functions and design optimisation, International Journal of Bio-Inspired Comutation, 2010,2(2): 78-84.

But, we can formulate reasonable repair and maintenance plans to increase the efficiency of track maintenance and ensure safety, if the prediction of track irregularity is effective.
The international union of railway technical research institute (ORE) defined the standard deviation and average of sinking, got the predict formula of the development rule of track longitudinal level irregularity using the sinking average [4].
Its geometric condition affects the running safety, stability and comfort of train.
Journal of Tongji University (natural science), 31(2003)291-295
Journal of Traffic and Transportation Engineering,4 (2004) 21-24

Joining the chorus, the International Civil Aviation Organization for Space urges harmonized safety standards, mirroring those in aviation, to enhance space safety.
Objects in orbit can travel at extremely high speeds, leading to potentially destructive collisions, risk to Space Stations and Crewed Missions, International Space Station (ISS), Human Spaceflight Safety etc.
Journal of Sustainable Tourism, 30(9), 2223–2239. https://doi.org/10.1080/09669582.2020.1783276 [7] Klinger, J.
Journal of Space Safety Engineering, 7(3), 432–438. https://doi.org/10.1016/j.jsse.2020.06.003 [62] Anselmo, L., & Pardini, C. (2015).
Indian Journal of Radio and Space Physics, 46(1), 20–26.  

Proceedings of the 1998 6th International Conference on Computer Aided Design, Manufacture and Operation in the Railway and Other Advanced Mass Transit Systems. 1998:199-214
Ninth International Conference on Computers in Railways, COMPRAIL IX. 2004:45-54
Journal of Transportation Systems Engineering and Information Technology, 2005, 5(1): 25-28
JOURNAL OF THE CHINA RAILWA Y SOCIETY. 2005, 27(2):120-125
Journal of Traffic and Transportation Engineering. 2005,5(4):20-26.

The plant-engineers should be informed about the margin of safety level of existing pipelines corresponding to the target safety level to assess the integrity of the corroded pipeline under operation.
The line that is located along to 10-4 of probability of failure indicates the target safety level.
Oh, Journal of the Korean Institute of Gas, Vol. 2, No. 2 (1998), p. 18~25 [2] O.
Kim, International Journal of KSPE, Vol. 4, No. 6 (2003), p. 12~19 [4] M.
Ahammed, International Journal of Pressure Vessels and Piping, Vol. 75 (1998), p. 321~329 [5] S.

Bearing-capacity load test of the prototype The load test of the prototype bridge was carried out before opening to traffic.
Additonal dynamic characteristics were obtained by traffic running testing.
The load tests proved that there was potential safety hazard under offset moving loads so the actual motor lanes number was changed to six since the bridge was open to traffic.
As a result, the number of designed vehicle lanes was reduced to guarantee the operating safety of the bridge.
Ding, Development of concrete-filled tubular arch bridges, China, Structural Engineering International, 11(4): 265~267. (2001) (in Chinese) [2] H.

The establishment of the evaluation index system Based on the above principles and relevant literature [5-9], we can divide the factors influence the Arctic route's navigation environment into five aspects: meteorological factors, hydrological factors, geographical factors, traffic regulation factors and the navigation aids information and facilities factors.
Traffic regulation factors include the marine criterion and the international navigation code in the ice area.
The goal of the Arctic route's navigation environment evaluation is to judge if the Arctic is navigable and how about the navigation safety is, so the Arctic route's navigation environment evaluation set can be classified by whether it can be navigated and thenavigation safety level condition.
[5] Jie Su, Dong Xu, Jinping Zhao, Xianghui Li, Jun Meng: Futures of northwest passage sea ice's distribution and variation under arctic rapidly warming condition[J].Chinese Journal of Polar Research. 2010 (22), 2, p104-123
[9] Guyun Chen: The Research on the Safety and Planning of the Navigable Environment of Shantou Sea Area [D].Dalian: Dalian maritime university. 2006

Indeed, the edge beams usually undergo higher stress levels and are more exposed to deterioration factors, as weather, chemical attacks of chlorides contained in de-icing salts and pollutants emitted by vehicle traffic.
De Stefano, Vibration tests on dismounted bridge beams and the effects of deterioration, Journal of Physics.
De Stefano, Symptom based reliability and generalized repairing cost in monitored bridges, Reliability Engineering & System Safety 94 (2009), 1331-1339 [6] S.W.
Mc Graw Hill International Editions, 2000 [8] UNI EN 1991-2:2005 Eurocode 1 - Actions On Structures - Part 2: Traffic Loads On Bridges [9] UNI EN 1990: 2002 Eurocode 0 – Basis of structural design [10] F.N.
Frangopol, Structural Health Monitoring and Reliability Estimation: Long Span Truss Bridge Application with Environmental Monitoring Data, Journal of Engineering Structures, Elsevier, 30 (2008), 2347-2359

Recommendations for the lighting of roads for motor and pedestrian traffic[R]，1995，115
Visual Adaptation Index for Driving Safety at Entrance and Exit of Highway Tunnel.
JOURNAL OF SOUTH CHINA UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE EDITION, 35（7）, 2007-07
Safety Operating Speed and Control Measure Based on Lighting Transition to Tunnel Entrance.
JOURNAL OF SHANDONG JIAOTONG UNIVERSITY, 15(1),2007-03.