Urban discrete transportation network design method based on active safety

A traffic network and active safety technology, applied in the field of traffic engineering, can solve problems in the infancy stage

Inactive Publication Date: 2018-10-19
SOUTHEAST UNIV
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  • Abstract
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While the emerging concept of traffic safety plan

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  • Urban discrete transportation network design method based on active safety
  • Urban discrete transportation network design method based on active safety
  • Urban discrete transportation network design method based on active safety

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing of description, the present invention will be further described:

[0031] Step 1: Active safety evaluation method based on speed coordination

[0032] The traffic safety evaluation based on speed coordination uses speed as the medium, and considers that speed is a representation of objective conditions such as roads and road networks. Generally speaking, the coordination of operating speed is an index to evaluate the consistency of alignment design, which has the following two meanings: ① the operating speed of the same road section is consistent with the design speed; ② the operating speed of adjacent road sections is consistent. Among them, the speed difference of adjacent road sections is a key parameter to ensure the quality of network design, that is, to ensure that drivers in the same road network can drive in a coherent manner, avoid or minimize operating errors, and improve safety. The "Highway Project Safety Evalu...

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Abstract

The invention provides an urban discrete transportation network design method based on active safety. Transportation safety is affected by each stage of transportation system planning, design, construction and operation, the profound influence of transportation planning on shaping the transportation system is considered, and transportation safety should be paid enough attention to in the transportation planning stage. The urban discrete transportation network design method adopts speed coordination as a substitute index of a network security level, establishes a double-layer planning model ofurban discrete transportation network design, and advances active safety evaluation to a road network planning stage. The main steps include: (1) determining an active safety evaluation method based on speed coordination; (2) establishing the double-layer planning model of urban discrete transportation network design, in the model, upper level planning taking network security as a policy objectiveand lower level planning taking user equilibrium as behavior reaction of a policy; (3) adopting an iterative optimization algorithm to solve the model; and (4) describing specific embodiments based on a Nguyen-Dupuis network frequently used in transportation network analysis.

Description

Technical field: [0001] The invention relates to an active safety-based urban discrete traffic network design method, which belongs to the technical field of traffic engineering. Background technique: [0002] Traditional traffic safety management is to diagnose and identify dangerous road sections and accident black spots through statistical analysis of a large number of accidents during road operation, and then propose corresponding improvement measures. Usually, it is affected by problems such as huge reconstruction costs, difficulty in collecting accident data, and the accuracy of data, and has little effect. At the same time, because post-event remedial measures are mostly limited to traffic engineering methods, the improvement effect on many dangerous road sections caused by road planning and design and other factors Poor, can not fundamentally solve the problem of frequent traffic accidents. With the research on passive traffic safety, people began to realize that if...

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/26G06Q50/30
CPCG06Q10/047G06Q10/0637G06Q10/06393G06Q50/265G06Q50/30
Inventor 林宏志褚晨予
Owner SOUTHEAST UNIV
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