A novel speed model for safety evaluation of freeway alignment in Euclidean 3D space

Wang, Xiaofei; Pu, HuaQiao; Yao, Jiangbei; Yan, Ying; Li, Xinwei; Zeng, Ziqiang

doi:10.1080/15389588.2019.1591620

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…Accordingly, maintaining a relatively stable speed is beneficial to keeping the service traffic volume as close as possible to the designed capacity. e average speed of the cross-section along the road space is commonly used as an index to evaluate the degree of the cross-section risk [26][27][28]. More specifically, the average speed reflects the influence of the weaving traffic flow on the vehicle in the weaving area.…”

Section: Average Speedmentioning

confidence: 99%

Risk Distribution Characteristics and Optimization of Short Weaving Area for Complex Municipal Interchanges

Liao

Yang

Ding

et al. 2021

Journal of Advanced Transportation

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This paper is focused on analyzing the risk distribution characteristics in short weaving areas of urban interchanges. The study was carried out on merge-diverge weaving areas with different lengths of 350 m, 450 m, and 550 m. To evaluate and identify the risk, the average speed, speed standard deviation, acceleration range, and average absolute value of acceleration were selected as indicators. Vissim simulation was applied to collect the identification indicator value of 21 typical lane sections. The results show that the risk is concentrated at the 3/4 section and exit section of the outer lane. The vehicle-operating status of the inner and middle lanes is almost unaffected. The operating speed of the outer lane is approximately 4/5 of the same position in the inner lane at 3/4 of the length of the weaving segment, while the speed standard deviation is approximately 2 times greater, and the acceleration range is approximately 2–3 times greater. Moreover, the acceleration of the average absolute value is also approximately 2–3 times greater. To balance the risk distribution, an optimization method is proposed based on the result analysis. Compared with the original design, the results show that a reasonable method of traffic organization for the complex weaving area can effectively improve the risk distribution in the weaving area and reduce the high peak of risk concentration. These results provide a basis for the optimization method and traffic organization of short weaving areas of municipal interchanges.

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Section: Average Speedmentioning

confidence: 99%