Optimum layout of freeway construction area based on crash cost control(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年05期
- Page:
- 97-103
- Research Field:
- 交通工程
- Publishing date:
Info
- Title:
- Optimum layout of freeway construction area based on crash cost control
- Author(s):
- WU Jiang-ling; ZHANG Sheng-rui; SINGH A K; MA Zhuang-lin; ZHOU Bei
- 1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Atkins North America Inc., Austin TX78758, Texas, USA; 3. School of Automobile, Chang’an University, Xi’an 710064, Shaanxi, China
- Keywords:
- traffic engineering; freeway maintenance; characteristic of construction area; TTC facility; crash cost
- PACS:
- U491
- DOI:
- -
- Abstract:
- In order to explore the optimal layout of freeway maintenance construction area under the condition of minimum cost of traffic crashes, the important indexes were selected and the traffic accident cost prediction model of freeway maintenance construction area was constructed on the basis of analyzing the characteristics of freeway maintenance construction area and temporary traffic control (TTC) facilities. A questionnaire survey was conducted to determine the influence level of the layout characteristics of freeway maintenance construction area on traffic accidents. Quantitative study of influence of the layout characteristics of freeway maintenance construction area on traffic accident risk was conducted to determine the accident rate change of the proposed maintenance operation sections. Taking traffic accident cost control as the goal, the objective function model of layout optimization of expressway construction area was established, so as to determine the optimal layout of construction area during maintenance period. The results show that the layout of freeway construction area has significant impacts on traffic accident cost of maintenance construction area. The corresponding layout parameters with the highest risk level in proposed 10 types of characteristics of construction area are daytime (6:00 to 10:00) construction, mobile construction, construction nearby entrance ramps, lane-width less than the standard, pavement marking, sun glare, no speed limited, construction equipment installation, tunnel group, heterogeneous fleet (large vehicle ratio is between 20% to 80%), respectively. Cruisers in construction area which guide the passage of vehicles can greatly reduce the traffic accidents to the largest extent compared to the other safety improvement countermeasures. The optimal layout of maintenance construction area obtained by solving the objective function model of layout optimization of freeway construction area which takes the traffic accident cost control as the goal, and empirical analysis proves the validity and practicability of the model. The research can provide a theoretical basis for optimizing the layout of construction area, evaluating the traffic safety management measures and cost benefit analysis of construction area.
Last Update: 2017-10-16