Smartphones and traffic signals: A quantitative assessment for phone usage behavior on performance of signalized intersections

IF 7.4 2区 工程技术 Q1 ENGINEERING, CIVIL Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2023-08-01 DOI:10.1016/j.jtte.2022.06.005
Wael ElDessouki, Abdulrahman AlManeea
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Abstract

Modern smartphones differ vastly from classic cellphones with enormous capabilities, changing cellphones from making phone calls and short messages to pocket-sized computers with full internet connectivity. The downside of modern phone evolution is changing drivers' behavior and phone usage addiction. Several researchers have investigated the safety implications of phone usage while driving on accidents risk. Nevertheless, the effect of phone usage on the performance of traffic facilities did not receive equal attention.

Hence, this research aims to study the impact of smartphone usage on traffic signal operations. The parameters considered in the study were drivers' activity while waiting at the signal, startup lost time, and saturation flow rate. The study team covered 25 intersections in the study area, observed the activities of over 6800 drivers while waiting at the signal, and recorded their corresponding discharge headways. The study team then supplemented field data with a behavioral survey questionnaire for drivers living in the study area to interpret field observations. Finally, the collected data were processed and analyzed, resulting in mathematical models for the relationship between the reduction in saturation flow rate and the red time interval.

The team found two primary conclusions. The study's first finding was that the traditional concept for estimating startup lost time adopted by the highway capacity manual (HCM) appears inaccurate. The field results revealed that the lost times caused by other distracted drivers upstream in the queue were comparable to the estimated startup lost time following the HCM method for estimating startup lost time. The second finding was that the reduction in saturation flow rate at the traffic signal is an exponential function of the red time interval, reducing the overall capacity for the intersection and increasing the average delay. Finally, the authors suggest mitigating the problem and making recommendations for future research.

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智能手机和交通信号:电话使用行为对信号交叉口性能的定量评估
现代智能手机与具有巨大功能的经典手机有很大不同,它将手机从打电话和发短信变成了具有完全互联网连接的袖珍电脑。现代手机进化的不利之处在于改变驾驶员的行为和手机使用成瘾。几位研究人员调查了开车时使用手机对事故风险的安全影响。然而,电话使用对交通设施性能的影响并没有得到同等重视。因此,本研究旨在研究智能手机使用对交通信号灯操作的影响。研究中考虑的参数包括驾驶员在等待信号时的活动、启动损失时间和饱和流速。研究小组覆盖了研究区域的25个十字路口,观察了6800多名司机在信号灯处等待时的活动,并记录了他们相应的流量车头时距。研究小组随后用一份针对居住在研究区域的司机的行为调查问卷补充了现场数据,以解释现场观察结果。最后,对收集到的数据进行了处理和分析,得出了饱和流速降低与红色时间间隔之间关系的数学模型。研究小组得出了两个主要结论。该研究的第一个发现是,公路通行能力手册(HCM)采用的估算启动损失时间的传统概念似乎不准确。现场结果显示,队列上游其他分心驾驶员造成的损失时间与HCM方法估计的启动损失时间相当。第二个发现是,交通信号灯饱和流率的降低是红色时间间隔的指数函数,降低了十字路口的总体通行能力,增加了平均延误。最后,作者建议减轻这一问题,并为未来的研究提出建议。
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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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