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Cooperative messages to enhance the performance of L3 vehicles approaching roadworks
European Transport Research Review ( IF 4.3 ) Pub Date : 2021-01-04 , DOI: 10.1186/s12544-020-00457-z
Serio Angelo Maria Agriesti , Marco Ponti , Giovanna Marchionni , Paolo Gandini

In the near future, automated vehicles will drive on public roads together with traditional vehicles. Even though almost the whole academia agrees on that statement, the possible interferences between the two different kinds of driver are still to be analyzed and the real impacts on the traffic flow to be under-stood. Aim of this paper is to study one of the most likely L3 automated system to be deployed on public roads in the short term: Highway Chauffeur. The analysis of this system is carried out on a roadwork scenario to assess the positive impacts arising from a joint implementation of the automated system and the C-ITS Use Case signaling the closure of a lane. In fact, the main contribution of this paper is the assessment of the possible benefits in travel times and driving regime arising from the joint implementation of the Highway Chauffeur system and of C-ITS messages, both for the vehicles equipped with both technologies and for the surrounding traffic. The assessment is achieved through traffic simulations carried out with the VISSIM software and a Python script developed by the authors. The overall process is described and the obtained results are provided, commented and compared to define the implementation of the C-ITS Use Case that could maximize the benefits of L3 driving. These results showed how triggering the take-over maneuver in ad-vance fosters the bottleneck efficiency (the same speed values reached between 80 and 100% Market Penetration for around 700 m range of the C-ITS message are reached at 50% Market Penetration with a 1500 m range). Besides, an in-creased speed up to 30 km/h at the bottleneck is recorded, depending on the mar-ket penetration and the message range. Finally, the delay upstream the roadworks entrance is reduced by 6% and arises at around 700 m, without the need to deploy the message up to 1500 m. The paper investigates the impacts of take-over maneuvers and of automated driving while considering different operational parameters such as the message range. The results suggest all the potentialities of the Use Case while providing interesting figures that frame the trends related to the different imple-mentations. Finally, the tool developed to carry out the presented analysis is re-ported and made available so that hopefully the Use Case may be explored further and a precise impact assessment may be carried out with different prototypes of AVs and on different infrastructures.

中文翻译:

合作消息,以提高接近道路工程的L3车辆的性能

在不久的将来,自动驾驶汽车将与传统汽车一起在公共道路上行驶。尽管几乎整个学术界都同意这一说法,但仍需分析两种不同类型的驾驶员之间可能存在的干扰,并且对交通流量的实际影响尚需了解。本文的目的是研究短期内最可能在公共道路上部署的L3自动化系统之一:Highway Chauffeur。该系统的分析是在道路工程场景下进行的,以评估由自动化系统和C-ITS用例的联合实施所产生的积极影响,该用例表明了封闭车道。事实上,本文的主要贡献是评估了同时配备了公路司机系统和C-ITS消息的旅行时间和驾驶方式可能带来的好处,这对于配备了这两种技术的车辆和周围的交通而言都是如此。评估是通过使用VISSIM软件和作者开发的Python脚本进行交通仿真来完成的。描述了整个过程,并提供,注释和比较了获得的结果,以定义可以最大程度地发挥L3驾驶优势的C-ITS用例的实现。这些结果表明,提前触发接管演习如何提高瓶颈效率(在C-ITS消息范围约700 m范围内,相同的速度值在80%和100%的市场渗透率之间达到,而在50%的市场渗透率下达到1500 m范围内)。此外,取决于市场渗透率和消息范围,记录到的瓶颈处最高时速可达30 km / h。最终,道路工程入口上游的延迟减少了6%,出现在700 m左右,而无需将消息部署到1500 m。本文研究接管演习和自动驾驶的影响,同时考虑不同的操作参数,例如消息范围。结果表明了用例的所有潜力,同时提供了有趣的数字来描述与不同实现相关的趋势。最后,为执行所介绍的分析而开发的工具将重新汇报并提供给大家,以便希望可以进一步探讨用例,并可以使用不同的AV原型和不同的基础设施进行精确的影响评估。
更新日期:2021-01-05
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