Method for assessing crossing risk of pedestrians at intersection on basis of trajectory data

Abstract

The invention relates to a method for assessing the crossing risk of pedestrians at an intersection on the basis of trajectory data. The method comprises the following steps of S1, extracting conflictindexes between motor vehicles and the pedestrians on the basis of the trajectory data; S2, identifying interactive modes of the pedestrians and motor vehicles on the basis of the extracted conflictindexes, and calculating potential collision probabilities between the pedestrians and motor vehicles according to different interaction modes; S3, calculating potential collision consequences of pedestrian-vehicle interaction events according to the vehicle types and vehicle speeds of the motor vehicles; S4, combining the collision probabilities with the potential collision consequences to createa risk assessment model; S5, according to a pedestrian crossing risk degree on each time and space calculation unit in the risk assessment model, obtaining a risk degree matrix and drawing a pedestrian crossing risk map according to the risk degree matrix; S6, combining an average pedestrian crossing risk degree in the risk assessment model with a subjective risk standard, dividing pedestrian crossing risk levels and conducting risk assessment. Compared with the prior art, the method has the advantages of comprehensive and accurate assessment and the like.

Description

technical field [0001] The invention relates to the field of traffic safety evaluation, in particular to a method for evaluating pedestrian crossing risk at intersections based on trajectory data. Background technique [0002] Intersections are gathering and distributing points for motor vehicle flow, non-motor vehicle flow and pedestrian flow in all directions. The complexity of its operating environment leads to a high risk of pedestrian injury or even death, and is a high-incidence area for accidents. Pedestrian safety evaluation is essentially a systematic and comprehensive evaluation of pedestrian safety based on various indicators. Pedestrian safety evaluation at intersections is a necessary prerequisite for traffic safety improvement and management at existing intersections. [0003] At present, the research methods for quantitative evaluation of pedestrian safety level can be mainly divided into two categories. [0004] One is the method of evaluating pedestrian sa...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned methods all stay at the static analysis of the number of conflicts or the severity of conflicts. However, in fact, pedestrians in different crossing positions and who have experienced different signal stages encounter different characteristics of traffic flow, which is different from the possibility of motor vehicle collision. Therefore, it is necessary to evaluate pedestrian crossing risk from two dimensions of time and space

In addition, the existing methods rarely combine the conflict evaluation with the subjective safety feeling of pedestrians crossing the street, and grade the safety level of pedestrians crossing the street

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