Evaluating the Impacts of the Road Marking Line Design on the Weaving Capacity in the Urban Area

A special road marking line design has been common in the weaving segment between the expressways and urban roads, which separates the lane-changing positions of the merging and diverging flows within the weaving segment. This study evaluated the impacts of such road marking line design on the weaving capacity for seven sites in Nanjing, China. The simulation tool and gap acceptance theory were used for capacity estimation. The results were compared with the ordinary type A weaving segment. The findings indicated that the impacts of such road marking line design on the capacity is related to the volume ratio, the merging and diverging ratio. According to the sensitivity analysis at the seven sites, it is unnecessary and unreasonable to implement such road marking line design in the following three cases: (1) when the volume ratio is larger than 0.7; (2) when the difference between the merging and diverging ratio is larger than 0.5.; (3) when the diverging ratio is larger than 0.6. Further, when the difference between merging and diverging ratio is around 0.2, such road marking line design can increase the weaving capacity in comparison with the ordinary type A weaving segment. Therefore, this study can provide some reasonable suggestions for the road designers to determine whether to implement such road marking line design in the weaving segment in the urban area.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AHB40 Standing Committee on Highway Capacity and Quality of Service.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Zhao, Jingya
    • Bao, Jie
    • Ouyang, Pengying
    • Xu, Chengcheng
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: 7p

Subject/Index Terms

Filing Info

  • Accession Number: 01698182
  • Record Type: Publication
  • Report/Paper Numbers: 19-03864
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:48AM