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首页> 外文期刊>Natural Hazards Review >Traffic Impacts and Dispersal Patterns on Secondary Roadways during Regional Evacuations
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Traffic Impacts and Dispersal Patterns on Secondary Roadways during Regional Evacuations

机译：区域疏散期间对次要道路的交通影响和疏散方式

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摘要

The evacuation of southeast Louisiana in the days prior to Hurricane Katrina represented the largest concentrated movement of traffic in the history of the state. Traffic data showed that nearly a half million vehicles, carrying an estimated one million people, flowed out of the New Orleans area before the storm. Since it was well recognized that evacuation traffic would overwhelm the available network capacity, Louisiana transportation and state police officials developed a plan to achieve a maximum utilization of the state's highest capacity evacuation routes. This paper differs from prior analyses by shifting the focus of attention from the impact of evacuation traffic on freeway and primary arterials to secondary and low volume roadways that have historically been underutilized during such emergencies. Analyses were conducted to determine how traffic was dispersed on the secondary roadway network, how long the impacts lasted, and where they were the most pronounced. The results suggest that many Katrina evacuees used roads in the secondary system as their primary routes of egress to far greater degrees than previously thought. They also indicate that secondary and low volume routes were also well used as alternatives to saturated interstate freeways and by evacuees seeking destinations not directly served by the primary highway network.
机译：卡特里娜飓风之前的几天，路易斯安那州东南部的疏散代表了该州历史上最大的交通集中。交通数据显示，暴风雨来临前，有将近50万辆汽车（估计载有100万人）从新奥尔良地区流出。由于人们普遍认为疏散交通会淹没可用的网络容量，因此路易斯安那州交通和州警察制定了一项计划，以最大程度地利用该州容量最大的疏散路线。本文与先前的分析不同，本文将注意力的重点从疏散交通对高速公路和主要干道的影响转移到历史上在此类紧急情况下未得到充分利用的次要和小流量道路。进行了分析，以确定交通如何分散在次要道路网络上，影响持续了多长时间以及影响最明显的地方。结果表明，许多卡特里娜飓风的疏散人员在次要系统中使用道路作为其主要的出口路线，其程度比以前想象的要大得多。他们还指出，次要路线和小流量路线还可以很好地用作饱和的州际高速公路的替代品，并且被疏散人员寻找主要公路网络不直接服务的目的地。

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