Geometric design safety estimation based on tire–road side friction |
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| Institution: | 1. Research Associate at Center for Advanced Infrastructure and Transportation (CAIT), Rutgers University, 100 Brett Rd, Piscataway Township, NJ 08854, United States;2. Department of Civil Engineering, Auburn University, Auburn, AL 36849-5337, United States;1. WISE Institute, 11F Centennial Complex, Hankuk University of Foreign Studies, 81 oedae-ro, Mohyeon-myeon, Cheoin-gu Gyeonggi-do, 17035, Republic of Korea;2. Smart Infrastructure Center, Korea Research Institute for Human Settlements, 5 Gukchaegyeonguwon-ro, Sejong-si, 30149, Republic of Korea;1. Key Laboratory of Road and Traffic Engineering, Ministry of Education, Shanghai 201804, China;2. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China;3. School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom;4. School of Transportation Engineering, Tongji University, Shanghai 201804, China;5. National Engineering Laboratory for Integrated Optimization of Road Traffic and Safety Analysis Technologies, China |
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| Abstract: | A closed-loop drive–vehicle–road–environment system (DVRES) model was established using Adams/Car and Matlab/Simulink. Dynamic responses of lateral tire forces based on tire–road side friction and road geometric characteristics are used to investigate vehicle side slip for geometric design safety estimation. The root mean square, the maximum values of lateral tire forces, comfort limit on curves and vehicle trajectories are used to quantify the safety margin of side friction. The simulation results show that the safety margins of lateral tire forces for radius, operating speed and superelevation rate were 18.2%, 19.3% and 17.6%, respectively, to guarantee good vehicle lateral reliability and ride comfort, while lower speeds are optimal in wet and slippery roads. Finally, a case study was conducted to illustrate the analysis of road design safety, and on-site experiment testing further validated the accuracy and reliability of the closed-loop DVRES model. |
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| Keywords: | Vehicles Dynamic response Road geometry Tire–road side friction Adams/Matlab |
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