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Development and testing of an image transformer for explainable autonomous driving systems 用于可解释自动驾驶系统的图像转换器的开发和测试
Pub Date : 2022-12-30 DOI: 10.1108/JICV-06-2022-0021
Jiqian Dong;Sikai Chen;Mohammad Miralinaghi;Tiantian Chen;Samuel Labi
Purpose - Perception has been identified as the main cause underlying most autonomous vehicle related accidents. As the key technology in perception, deep learning (DL) based computer vision models are generally considered to be black boxes due to poor interpretability. These have exacerbated user distrust and further forestalled their widespread deployment in practical usage. This paper aims to develop explainable DL models for autonomous driving by jointly predicting potential driving actions with corresponding explanations. The explainable DL models can not only boost user trust in autonomy but also serve as a diagnostic approach to identify any model deficiencies or limitations during the system development phase. Design/methodology/approach - This paper proposes an explainable end-to-end autonomous driving system based on "Transformer," a state-of-the-art self-attention (SA) based model. The model maps visual features from images collected by onboard cameras to guide potential driving actions with corresponding explanations, and aims to achieve soft attention over the image's global features. Findings - The results demonstrate the efficacy of the proposed model as it exhibits superior performance (in terms of correct prediction of actions and explanations) compared to the benchmark model by a significant margin with much lower computational cost on a public data set (BDD-OIA). From the ablation studies, the proposed SA module also outperforms other attention mechanisms in feature fusion and can generate meaningful representations for downstream prediction. Originality/value - In the contexts of situational awareness and driver assistance, the proposed model can perform as a driving alarm system for both human-driven vehicles and autonomous vehicles because it is capable of quickly understanding/characterizing the environment and identifying any infeasible driving actions. In addition, the extra explanation head of the proposed model provides an extra channel for sanity checks to guarantee that the model learns the ideal causal relationships. This provision is critical in the development of autonomous systems.
目的-感知已被确定为大多数自动驾驶汽车相关事故的主要原因。作为感知领域的关键技术,基于深度学习的计算机视觉模型由于其可解释性差,通常被认为是黑匣子。这些加剧了用户的不信任,并进一步阻止了它们在实际使用中的广泛部署。本文旨在通过联合预测潜在的驾驶行为和相应的解释,开发可解释的自动驾驶DL模型。可解释的DL模型不仅可以提高用户对自主性的信任,还可以作为一种诊断方法,在系统开发阶段识别任何模型缺陷或限制。设计/方法/方法-本文提出了一种基于“Transformer”的可解释的端到端自动驾驶系统,这是一种最先进的基于自注意(SA)的模型。该模型从车载摄像头收集的图像中映射视觉特征,以通过相应的解释来指导潜在的驾驶行为,并旨在实现对图像全局特征的软关注。研究结果-结果证明了所提出的模型的有效性,因为与基准模型相比,该模型在公共数据集(BDD-OIA)上表现出显著的优越性能(在行动和解释的正确预测方面),计算成本低得多。从消融研究来看,所提出的SA模块在特征融合方面也优于其他注意力机制,并且可以为下游预测生成有意义的表示。独创性/价值-在情景感知和驾驶员辅助的背景下,所提出的模型可以作为人类驾驶车辆和自动驾驶车辆的驾驶警报系统,因为它能够快速了解/表征环境并识别任何不可行的驾驶行为。此外,所提出的模型的额外解释头为健全性检查提供了额外的通道,以确保模型学习理想的因果关系。这一规定对自主系统的发展至关重要。
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引用次数: 10
Optimal control of automated left-turn platoon at contraflow left-turn lane intersections 逆向左转车道交叉口自动左转弯排的优化控制
Pub Date : 2022-12-30 DOI: 10.1108/JICV-03-2022-0007
Hanyu Yang;Jing Zhao;Meng Wang
Purpose - This study aims to propose a centralized optimal control model for automated left-turn platoon at contraflow left-turn lane (CLL) intersections. Design/methodology/approach - The lateral lane change control and the longitudinal acceleration in the control horizon are optimized simultaneously with the objective of maximizing traffic efficiency and smoothness. The proposed model is cast into a mixed-integer linear programming problem and then solved by the branch-and-bound technique. Findings - The proposed model has a promising control effect under different geometric controlled conditions. Moreover, the proposed model performs robustly under various safety time headways, lengths of the CLL and green times of the main signal. Originality/value - This study proposed a centralized optimal control model for automated left-turn platoon at CLL intersections. The lateral lane change control and the longitudinal acceleration in the control horizon are optimized simultaneously with the objective of maximizing traffic efficiency and smoothness.
目的——本研究旨在提出一个反流左转车道(CLL)交叉口自动左转排的集中最优控制模型。设计/方法/方法-横向变道控制和控制范围内的纵向加速度同时优化,目标是最大限度地提高交通效率和顺畅度。该模型被转化为一个混合整数线性规划问题,然后用分枝定界技术求解。研究结果-所提出的模型在不同的几何控制条件下具有良好的控制效果。此外,该模型在不同的安全时距、CLL长度和主信号绿灯时间下表现稳健。独创性/价值-本研究提出了CLL交叉口自动左转排的集中最优控制模型。横向变道控制和控制范围内的纵向加速度是同时优化的,目的是最大限度地提高交通效率和平顺性。
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引用次数: 0
Social relation and physical lane aggregator: Integrating social and physical features for multimodal motion prediction 社交关系和物理车道聚合器:整合社交和物理特征进行多模式运动预测
Pub Date : 2022-12-30 DOI: 10.1108/JICV-07-2022-0028
Qiyuan Chen;Zebing Wei;Xiao Wang;Lingxi Li;Yisheng Lv
Purpose - The purpose of this paper aims to model interaction relationship of traffic agents for motion prediction, which is critical for autonomous driving. It is obvious that traffic agents' trajectories are influenced by physical lane rules and agents' social interactions. Design/methodology/approach - In this paper, the authors propose the social relation and physical lane aggregator for multimodal motion prediction, where the social relations of agents are mainly captured with graph convolutional networks and self-attention mechanism and then fused with the physical lane via the self-attention mechanism. Findings - The proposed methods are evaluated on the Waymo Open Motion Dataset, and the results show the effectiveness of the proposed two feature aggregation modules for trajectory prediction. Originality/value - This paper proposes a new design method to extract traffic interactions, and the attention mechanism is used in each part of the model to extract and fuse different relational features, which is different from other methods and improves the accuracy of the LSTM-based trajectory prediction method.
目的——本文旨在为运动预测建模交通代理的交互关系,这对自动驾驶至关重要。很明显,交通代理的轨迹受到物理车道规则和代理的社交互动的影响。设计/方法/方法-在本文中,作者提出了用于多模式运动预测的社会关系和物理车道聚合器,其中主体的社会关系主要通过图卷积网络和自注意机制捕获,然后通过自注意机制与物理车道融合。研究结果-在Waymo开放运动数据集上对所提出的方法进行了评估,结果表明了所提出的两个特征聚合模块用于轨迹预测的有效性。独创性/价值-本文提出了一种新的设计方法来提取交通交互,并在模型的每个部分使用注意力机制来提取和融合不同的关系特征,这与其他方法不同,提高了基于LSTM的轨迹预测方法的准确性。
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引用次数: 4
Less workplace parking with fully autonomous vehicles? 使用全自动驾驶汽车减少工作场所停车?
Pub Date : 2022-12-30 DOI: 10.1108/JICV-07-2022-0029
Stefan Tscharaktschiew;Felix Reimann
Purpose - Recent studies on commuter parking in an age of fully autonomous vehicles (FAVs) suggest, that the number of parking spaces close to the workplace demanded by commuters will decline because of the capability of FAVs to return home, to seek out (free) parking elsewhere or just cruise. This would be good news because, as of today, parking is one of the largest consumers of urban land and is associated with substantial costs to society. None of the studies, however, is concerned with the special case of employer-provided parking, although workplace parking is a widespread phenomenon and, in many instances, the dominant form of commuter parking. The purpose of this paper is to analyze whether commuter parking will decline with the advent of self-driving cars when parking is provided by the employer. Design/methodology/approach - This study looks at commuter parking from the perspective of both the employer and the employee because in the case of employer-provided parking, the firm's decision to offer a parking space and the incentive of employees to accept that offer are closely interrelated because of the fringe benefit character of workplace parking. This study develops an economic equilibrium model that explicitly maps the employer-employee relationship, considering the treatment of parking provision and parking policy in the income tax code and accounting for adverse effects from commuting, parking and public transit. This study determines the market level of employer-provided parking in the absence and presence of FAVs and identifies the factors that drive the difference. This study then approximates the magnitude of each factor, relying on recent (first) empirical evidence on the impacts of FAVs. Findings - This paper's analysis suggests that as long as distortive (tax) policy favors employer-provided parking, FAVs are no guarantee to end up with less commuter parking. Originality/value - This study's findings imply that in a world of self-driving cars, policy intervention related to work commuting (e.g. fringe benefit taxation or transport pricing) might be even more warranted than today.
目的-最近关于全自动驾驶汽车时代通勤者停车的研究表明,通勤者所需的靠近工作场所的停车位数量将下降,因为全自动驾驶车辆能够回家、在其他地方寻求(免费)停车或只是巡游。这将是一个好消息,因为截至今天,停车场是城市土地的最大消费者之一,与社会的巨大成本有关。然而,没有一项研究涉及雇主提供停车的特殊情况,尽管工作场所停车是一种普遍现象,在许多情况下,也是通勤停车的主要形式。本文的目的是分析当雇主提供停车位时,通勤停车位是否会随着自动驾驶汽车的出现而减少。设计/方法/方法-本研究从雇主和员工的角度看待通勤停车,因为在雇主提供停车的情况下,公司提供停车位的决定和员工接受该提议的动机是密切相关的,因为工作场所停车的附带利益特征。本研究开发了一个经济均衡模型,该模型明确映射了雇主与雇员的关系,考虑了所得税法中对停车规定和停车政策的处理,并考虑了通勤、停车和公共交通的不利影响。这项研究确定了在没有和存在FAV的情况下,雇主提供的停车场的市场水平,并确定了造成差异的因素。然后,这项研究根据最近(第一次)关于FAV影响的经验证据,对每个因素的大小进行了近似。调查结果-本文的分析表明,只要扭曲的(税收)政策有利于雇主提供的停车场,FAV就不能保证最终通勤停车场会减少。独创性/价值-这项研究的发现表明,在自动驾驶汽车的世界里,与工作通勤相关的政策干预(如附加福利税或交通定价)可能比今天更有必要。
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引用次数: 1
Front and back cover 封面和封底
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引用次数: 0
Front and back cover 封面和封底
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引用次数: 0
Merging control strategies of connected and autonomous vehicles at freeway on-ramps: A comprehensive review 高速公路匝道连接车辆和自动驾驶车辆的合并控制策略:综述
Pub Date : 2022-12-30 DOI: 10.1108/JICV-02-2022-0005
Jie Zhu;Said Easa;Kun Gao
Purpose - On-ramp merging areas are typical bottlenecks in the freeway network since merging on-ramp vehicles may cause intensive disturbances on the mainline traffic flow and lead to various negative impacts on traffic efficiency and safety. The connected and autonomous vehicles (CAVs), with their capabilities of real-time communication and precise motion control, hold a great potential to facilitate ramp merging operation through enhanced coordination strategies. This paper aims to present a comprehensive review of the existing ramp merging strategies leveraging CAVs, focusing on the latest trends and developments in the research field. Design/methodology/approach - The review comprehensively covers 44 papers recently published in leading transportation journals. Based on the application context, control strategies are categorized into three categories: merging into sing-lane freeways with total CAVs, merging into singlane freeways with mixed traffic flows and merging into multilane freeways. Findings - Relevant literature is reviewed regarding the required technologies, control decision level, applied methods and impacts on traffic performance. More importantly, the authors identify the existing research gaps and provide insightful discussions on the potential and promising directions for future research based on the review, which facilitates further advancement in this research topic. Originality/value - Many strategies based on the communication and automation capabilities of CAVs have been developed over the past decades, devoted to facilitating the merging/lane-changing maneuvers at freeway on-ramps. Despite the significant progress made, an up-to-date review covering these latest developments is missing to the authors' best knowledge. This paper conducts a thorough review of the cooperation/coordination strategies that facilitate freeway on-ramp merging using CAVs, focusing on the latest developments in this field. Based on the review, the authors identify the existing research gaps in CAV ramp merging and discuss the potential and promising future research directions to address the gaps.
目的-入口匝道合流区是高速公路网中的典型瓶颈,因为入口匝道车辆的合流可能会对主线交通流造成严重干扰,并对交通效率和安全产生各种负面影响。联网自动驾驶汽车(CAV)具有实时通信和精确运动控制的能力,在通过加强协调策略促进匝道合流运营方面具有巨大潜力。本文旨在全面回顾利用CAV的现有匝道合并策略,重点关注研究领域的最新趋势和发展。设计/方法/方法-该综述全面涵盖了最近在主要交通期刊上发表的44篇论文。根据应用背景,控制策略可分为三类:合并为总CAV的单车道高速公路、合并为混合交通流的单车道公路和合并为多车道高速公路。调查结果-审查了有关所需技术、控制决策水平、应用方法和对交通性能的影响的相关文献。更重要的是,作者确定了现有的研究差距,并在综述的基础上对未来研究的潜在和有前景的方向进行了深入的讨论,这有助于该研究主题的进一步发展。独创性/价值-在过去的几十年里,基于CAV的通信和自动化能力开发了许多策略,致力于促进高速公路入口匝道的并线/变道操作。尽管取得了重大进展,但据作者所知,还没有一篇涵盖这些最新进展的最新综述。本文对使用CAV促进高速公路入口匝道合并的合作/协调策略进行了全面审查,重点关注该领域的最新发展。在综述的基础上,作者确定了CAV匝道合并中现有的研究空白,并讨论了解决这些空白的潜在和有前景的未来研究方向。
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引用次数: 32
Evaluating the moderating effect of in-vehicle warning information on mental workload and collision avoidance performance 车内预警信息对心理负荷和防撞性能的调节作用评价
Pub Date : 2022-12-30 DOI: 10.1108/JICV-03-2021-0003
Chen Chai;Ziyao Zhou;Weiru Yin;David S. Hurwitz;Siyang Zhang
PurposeThe presentation of in-vehicle warnings information at risky driving scenarios is aimed to improve the collision avoidance ability of drivers. Existing studies have found that driver’s collision avoidance performance is affected by both warning information and driver’s workload. However, whether moderation and mediation effects exist among warning information, driver’s cognition, behavior and risky avoidance performance is unclear.Design/methodology/approachThis purpose of this study is to examine whether the warning information type modifies the relationship between the forward collision risk and collision avoidance behavior. A driving simulator experiment was conducted with waring and command information.FindingsResults of 30 participants indicated that command information improves collision avoidance behavior more than notification warning under the forward collision risky driving scenario. The primary reason for this is that collision avoidance behavior can be negatively affected by the forward collision risk. At the same time, command information can weaken this negative effect. Moreover, improved collision avoidance behavior can be achieved through increasing drivers’ mental workload.Practical implicationsThe proposed model provides a comprehensive understanding of the factors influencing collision avoidance behavior, thus contributing to improved in-vehicle information system design.Originality/valueThe significant moderation effects evoke the fact that information types and mental workloads are critical in improving drivers’ collision avoidance ability. Through further calibration with larger sample size, the proposed structural model can be used to predict the effect of in-vehicle warnings in different risky driving scenarios.
目的-在危险驾驶场景中展示车内警告信息旨在提高驾驶员的防撞能力。现有研究发现,驾驶员的防撞性能受到警告信息和驾驶员工作量的影响。然而,在警告信息、驾驶员认知、行为和避险行为之间是否存在适度和中介作用尚不清楚。设计/方法/方法-本研究的目的是检查警告信息类型是否会改变前方碰撞风险和防撞行为之间的关系。利用预警和指挥信息进行了驾驶模拟实验。调查结果-30名参与者的结果表明,在前方碰撞风险驾驶场景下,指挥信息比通知警告更能改善防撞行为。造成这种情况的主要原因是,防撞行为可能会受到前方碰撞风险的负面影响。同时,命令信息可以削弱这种负面影响。此外,可以通过增加驾驶员的心理工作量来改善防撞行为。实际意义-所提出的模型全面了解了影响防撞行为的因素,从而有助于改进车辆信息系统设计。独创性/价值-显著的适度效应唤起了这样一个事实,即信息类型和心理工作量对提高驾驶员的防撞能力至关重要。通过更大样本量的进一步校准,所提出的结构模型可用于预测不同风险驾驶场景下车内警告的效果。
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引用次数: 4
Front and back cover 封面和封底
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引用次数: 0
Copyright page 版权页
{"title":"Copyright page","authors":"","doi":"","DOIUrl":"https://doi.org/","url":null,"abstract":"","PeriodicalId":100793,"journal":{"name":"Journal of Intelligent and Connected Vehicles","volume":"5 3","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/9944931/10004521/10004523.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67856134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Journal of Intelligent and Connected Vehicles
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