Improved Speed Estimation From Single-Loop Detectors With High Truck Flow
Improved Speed Estimation From Single-Loop Detectors With High Truck Flow
复制标题
DOI：
10.1080/15472450.2013.801708
复制
发表时间：
2014-04
影响因子：
3.6
通讯作者：
B. Coifman;Srikanth Neelisetty
中科院分区：
文献类型：
--
作者：
B. Coifman;Srikanth Neelisetty
单回路检测器是高速公路交通管理机构最常用的传感器。这些数据用于交通管理和旅行者信息。单回路探测器只能测量流量和占用率。虽然速度通常是最有用的度量，但它只能在传统的单回路检测器中进行估计。通常，该估计值来自流量和占用率的商乘以固定的、假设的平均有效车辆长度。这种传统的方法是有限的，因为实际的平均有效车辆长度将从样本到样本而变化。许多研究人员提出了解决这个问题的替代方案，虽然许多方法在正常条件下工作良好，但对重型卡车交通下产生可靠估计的方法的研究有限。重型卡车流量可能会随着位置或一天中的时间而出现，例如，接近卡车运输设施或在清晨客运车辆数量下降时。本文提出了一种新的方法来估计速度从单回路检测器的条件下，卡车组成的车队的很大比例。虽然重点是单回路探测器，工作同样适用于侧射微波雷达探测器，模拟单回路探测器。
Single-loop detectors are the most common sensors employed by freeway traffic management agencies. The data are used for traffic management and traveler information. Single-loop detectors can only measure flow and occupancy. Although speed is often the most useful metric, it can only be estimated at conventional single-loop detectors. Typically this estimate comes from the quotient of flow and occupancy multiplied by the fixed, assumed average effective vehicle length. This conventional approach is limited because the actual average effective vehicle length will vary from sample to sample. Many researchers have proposed alternatives to address this problem, and although many of the methods work well under normal conditions, there has been limited research into methods that yield reliable estimates under heavy truck traffic. Heavy truck flows may arise as a function of location or time of day, for example, with proximity to a trucking facility or in early mornings when the number of passenger vehicles drops, respectively. This article presents a new methodology to estimate speed from single-loop detectors in conditions where trucks comprise a large percentage of the fleet. While the focus is on single loop detectors, the work is equally applicable to side-fire microwave radar detectors that emulate single-loop detectors.