Protective guard evaluation method and device

Abstract

The embodiment of the invention provides a protective guard evaluation method and device. The method comprises the steps: determining and setting the safety benefit generated by an assessed protective guard according to the number of predicted accidents and the collision loss value of a single vehicle, wherein the collision loss value is determined according to the protection energy of the assessed protective guard; determining the protection cost according to the cost for constructing and maintaining the evaluated protective guard; and evaluating the evaluated protective guard according to the safety benefit and the protection cost. In some embodiments of the present application, the safety benefit of setting the assessed protective guard is determined according to the collision energy loss value and the predicted number of accidents, and the protection cost of the protective guard is determined by configuring the cost of the protective guard. That is to say, in some embodiments of the invention, a method for quantifying the cost effectiveness of the to-be-evaluated protective guard is provided, so that related departments or personnel can determine whether the to-be-evaluated protective guard is set properly or not according to a quantification result.

Description

Technical field[0001]The present application relates to the field of road side risk assessment, and in particular, the examples of the present application relate to a protective column assessment method and a device.Background technique[0002]my country's current road design norms "Highway Traffic Safety Facilities Design Rules" Proposed "Determine whether to set up guardrails, protection levels and form requirements based on cost-benefit", but did not give a specific method based on cost-effective analysis based on protective columns. In the prior art, the selection of guardrail protection level is based on the design specification, according to the highway technology level, design speed status is selected to select the corresponding guardrail protection level. When the path line condition and the roadside risk meet certain conditions, the guardrail protection level will increase the level.[0003]The inventors of this application find that due to the prior art guardrail protection le...

AI Technical Summary

Problems solved by technology

[0003] The inventor of the present application found that because the selection of guardrail protection level in the prior art is a simple qualitative inference method, the traffic volume of the road section, the number of various types of vehicles, the alignment index of the road section, the accident loss of different roadside dangerous objects, and various Quantitative accident risk analysis is carried out on elements such as the actual operating speed of the vehicle model, so the selection of guardrail protection levels cannot effectively target the actual traffic operation risks of specific road sections. It may be due to improper selection of guardrail protection levels, resulting in insufficient protection or excessive protection.

Secondly, the existing roadside hazard classification method studies the relationship between slope slope and accident severity, the relationship between driving speed and accident severity, and the relationship between slope height and roadside accident severity. When there is a guardrail on the roadside, the role of the design protection energy of the guardrail in the roadside safety evaluation

[0004] For example, when the proportion of natural numbers of vehicles with a total mass greater than or equal to 25t is greater than 20%, the design is generally simply based on the design specifications, and the protection level of the guardrail is raised by one level, and the cost-effectiveness brought about by the improvement of the protection level of the guardrail is not quantified. According to the analysis, when the probability of roadside accidents is not high and the consequences of the accident are not serious when the vehicle drives off the road, the increased construction cost of improving the protection level of the guardrail will not bring significant benefits, and will cause a waste of construction funds

Images