The invention relates to the technical field of intelligent traffic safety, and discloses an expressway small-radius ramp dynamic speed limit threshold setting and early warning method, which comprises the following steps of: 1, acquiring geometric data of an interchange of an expressway, acquiring weather information, and storing the weather information in a database; a road surface state detector is arranged on the ramp road surface to obtain the road surface information of the ramp, and high-precision radars are arranged at the ramp at intervals to obtain the vehicle speed; 2, calculating a road adhesion coefficient mu according to ramp data, weather data and road information, respectively calculating safety speed limit values for a passenger car and a truck, and establishing a ramp rain and snow day dynamic threshold setting model; and 3, arranging an information issuing device for issuing safety speed limit information on the ramp road section, and arranging a receiving device for receiving the safety speed limit information in the vehicle. The invention provides a method for dynamically limiting the speed of different types of vehicles in rainy and snowy weather.

    本发明涉及智能交通安全技术领域领域,公开了高速公路小半径匝道动态限速阈值设置及预警方法,包括以下步骤:步骤一:对高速公路的互通立交几何数据进行采集,采集天气信息,并在匝道路面设置路面状态检测器以获取该匝道处的路面信息,在匝道处间隔设置高精雷达获取车辆速度;步骤二:根据匝道数据、天气数据和路面信息,计算路面附着系数μ,针对小客车和大货车分别计算安全限速值,建立匝道雨雪天动态阈值设置模型;步骤三:在匝道路段设置发布安全限速信息的信息发布装置,在车辆内部设置接收安全限速信息的接收装置。以提供一种对不同类型的车辆在雨雪天气进行动态限速的方法。


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    Title :

    Dynamic speed limit threshold setting and early warning method for small-radius ramp of expressway


    Additional title:

    高速公路小半径匝道动态限速阈值设置及预警方法


    Contributors:
    ZHENG ZHANJI (author) / CHEN ZHENGWEI (author) / WANG YANPENG (author) / XU JIN (author) / ZHANG HESHAN (author) / QIN YANYAN (author)

    Publication date :

    2023-10-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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