Investigating distance halo effect of fixed automated speed camera based on taxi GPS trajectory data

IF 7.4 2区 工程技术 Q1 ENGINEERING, CIVIL
Chuanyun Fu , Hua Liu
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引用次数: 3

Abstract

Background

The deterrence effect of automated speed camera (ASC) is still inconclusive. Moreover, it is pointed out that ASC may have varying deterrence effects on different types of road users (e.g., taxis).

Objective

This study intends to investigate the distance halo effect of fixed ASC (hereafter called ASC) on taxis.

Method

More than 1.34 million taxis' GPS trajectory data were collected. A novel indicator, the delta speed (defined as the difference between the traveling speed and the speed limit), was proposed to continuously describe the variations in traveling speeds. The upstream and downstream critical delta speeds during each time period on weekdays and weekends were obtained by using K-means clustering method, respectively. Based on the critical delta speeds, the ranges of upstream and downstream distance halo effects of ASC during different time periods on weekdays and weekends were determined separately and compared.

Results

The downstream critical delta speed is smaller than the upstream one. The upstream and downstream distance halo effects of ASC on taxis are within a range of 8–2180 m and an area of 10–580 m to the ASC location, respectively. There are no obvious difference in the ranges of upstream and downstream distance halo effects of ASC on taxis between different time periods or between weekdays and weekends.

Conclusion

The present study confirms that the upstream and downstream distance halo effects of ASC on taxis have different ranges and the stabilities of time-of-day and day-of-week. Practical application: The findings of this study can provide a basic reference for reasonably deploying ASCs within a region.

基于出租车GPS轨迹数据的固定式自动测速摄像机距离晕效应研究
背景自动测速相机(ASC)的威慑效果尚不确定。此外,还指出ASC对不同类型的道路使用者(如出租车)可能具有不同的威慑作用。目的研究固定ASC(以下简称ASC)对出租车的距离晕效应。方法收集了134万余辆出租车的GPS轨迹数据。提出了一种新的指标,即德尔塔速度(定义为行驶速度和限速之间的差),以连续描述行驶速度的变化。分别使用K-means聚类方法获得了工作日和周末每个时间段的上游和下游临界三角洲速度。基于临界三角洲速度,分别确定了ASC在工作日和周末不同时间段的上下游距离晕效应范围,并进行了比较。结果下游临界三角洲速度小于上游。ASC对出租车的上游和下游距离晕效应分别在距ASC位置8–2180 m和10–580 m的范围内。ASC对出租车上下游距离晕效应的影响范围在不同时间段或工作日与周末之间没有明显差异。结论ASC对出租车的上下游距离晕效应具有不同的范围,并且在一天中的时间和一周中的一天中具有稳定性。实际应用:本研究的结果可以为在一个地区内合理部署ASC提供基本参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
13.60
自引率
6.30%
发文量
402
审稿时长
15 weeks
期刊介绍: The Journal of Traffic and Transportation Engineering (English Edition) serves as a renowned academic platform facilitating the exchange and exploration of innovative ideas in the realm of transportation. Our journal aims to foster theoretical and experimental research in transportation and welcomes the submission of exceptional peer-reviewed papers on engineering, planning, management, and information technology. We are dedicated to expediting the peer review process and ensuring timely publication of top-notch research in this field.
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