The invention discloses a highway interlacing area hard shoulder open risk assessment method based on ITA and KDE. The highway interlacing area hard shoulder open risk assessment method comprises the following steps: step 1, collecting and recording vehicle operation data in different scenes; 2, track extraction and coordinate preprocessing; step 3, identifying potential conflict risks based on ITA; step 4, carrying out space aggregation on conflict points by utilizing a KDE method; 5, comparing the KDE results in the non-open scene and the open scene of the hard shoulder; and 6, judging the critical and saturated intervals of the hard shoulder by combining the ramp/main line flow ratio. According to actual measurement data of the same road section in a peak period, vehicle tracks in a hard shoulder non-open scene and a hard shoulder open scene are respectively collected. Through visualization and superposition comparison of respective ITA distribution and KDE results of two groups of data, on one hand, a main line inner side lane conflict mitigation effect brought by hard shoulder opening can be quantified; on the other hand, risk outward movement caused by the fact that a vehicle crosses an outer lane and a hard road shoulder can be visually observed.
本发明公开了一种基于ITA与KDE的高速公路交织区硬路肩开放风险评估方法,包括以下步骤:步骤1:采集并记录不同场景下的车辆运行数据;步骤2:轨迹提取与坐标预处理;步骤3:基于ITA识别潜在冲突风险;步骤4:利用KDE方法对冲突点进行空间聚集;步骤5:对比硬路肩未开放与开放场景下的KDE结果;步骤6:结合匝道/主线流量比判定硬路肩临界与饱和区间。本发明针对同一路段在高峰时段的实测数据,分别采集硬路肩未开放与开放两种场景下的车辆轨迹。通过对两组数据各自的ITA分布与KDE结果进行可视化与叠加对比,一方面可量化硬路肩开放带来的主线内侧车道冲突缓解效应;另一方面亦能直观观察到由于车辆跨越外侧车道及硬路肩带来的风险外移。
Method for evaluating open risk of hard road shoulder of interlaced area of expressway based on ITA and KDE
基于ITA与KDE的高速公路交织区硬路肩开放风险评估方法
2025-05-30
Patent
Electronic Resource
Chinese
IPC: | G06V / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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