Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (6): 1308-1314.doi: DOI:10.13229/j.cnki.jdxbgxb20210014

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Safety analysis of main line under different traffic conditions in expressway confluence area

Xin ZHANG1(),Wei-hua ZHANG2   

  1. 1.School of Automation，Nanjing University of Science and Technology，Nanjing 210094，China
    2.School of Automotive and Transportation Engineering，Hefei University of Technology，Hefei 230009，China
  • Received:2021-01-11 Online:2022-06-01 Published:2022-06-02

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Abstract:

In order to explore the safety of the mainline in expressway confluence area， firstly， based on the traffic data and related research， the relationship between average speed and accident rate of the inner lane and the middle lane is analyzed by using statistical methods， then， combined with models of average speed-accident rate， Greenberg and Underwood， traffic density-accident rate models（AR-k） of inner lane and middle lane with larger and smaller traffic density k are constructed respectively， and then， influence of k of two lane and cumulative number of vehicles n on traffic safety is analyzed from the qualitative and quantitative point of view， results show that that n and k have a great influence on AR no matter in which lane and whether k is small or large. Finally， some measures to improve traffic safety are put forward from two aspects of controlling traffic volume and limiting the speed in confluence area.

Key words: traffic engineering, expressway confluence area, traffic density, accident rates, traffic safety

CLC Number: 

  • U491.31

Fig.1

Average speed-accident rate scatter distribution"

Fig.2

Change of AR-k-n of inner lane"

Fig.3

Change of AR-k-n of middle lane"

Fig.4

Change of AR-k of inner lane"

Fig.5

Change of AR-k of middle lane"

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