Safety and operational impact of connected vehicles’ lane configuration on freeway facilities with managed lanes

Abdel-Aty, Mohamed; Wu, Yina; Saad, Moatz; Rahman, Sharikur

doi:10.1016/j.aap.2020.105616

Cited by 17 publications

(8 citation statements)

References 14 publications

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“…Most studies reviewed, set the same TTC threshold for mixed traffic without considering the effect of vehicle technology. Many researchers employed the same 2 sec TTC threshold [74,75] and 1.5 s [76,77] for different types of vehicles operating in mixed traffic situations (see Appendix Table A1). A handful of researchers used different TTC thresholds based on the car following situations; however, no justification of the threshold value selection was cited.…”

Section: B Study Platforms and Facilities Coveredmentioning

confidence: 99%

Surrogate Safety Measures: Review and Assessment in Real-World Mixed Traditional and Autonomous Vehicle Platoons

Das

Samandar²,

Autry

et al. 2023

IEEE Access

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Surrogate safety measures (SSMs) are critical tools for evaluating the safety performance of mixed traffic. Crashes are rare events, and historical crash data is scarce for mixed traffic that includes autonomous and/ or connected vehicles. Recent safety review papers focus on traditional human-driven vehicles (TVs) and do not encompass advanced technology vehicles such as Autonomous Vehicles (AVs), Connected Vehicles (CVs), and Connected-Autonomous Vehicles (CAVs). This study examines the development, implementation, and shortcomings of SSMs, and SSM-based models used for mixed traffic safety evaluation. It reviews the current relevant literature and applies a case study analysis using a real-world mixed traffic dataset. The study summarizes the fundamental SSM guiding concepts, as well as their most significant metrics including threshold values employed in the past for SSMs and SSM-based models. Primary benefits and limitations of examined SSMs and SSM-based models are also underlined. This review reveals significant gaps in the literature that might guide future research paths in SSM-based mixed traffic safety assessment. Critical gaps include the absence of robust SSM threshold selection criteria, the suitability of current SSMs in mixed traffic research, microsimulation modeling that lacks proper calibration and validation, and the absence of a framework for selecting or combining multiple SSMs.INDEX TERMS Mixed traffic, surrogate safety measures, real-world mixed traffic dataset, autonomous vehicles, connected vehicles, connected-autonomous vehicles

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Section: B Study Platforms and Facilities Coveredmentioning

confidence: 99%

Surrogate Safety Measures: Review and Assessment in Real-World Mixed Traditional and Autonomous Vehicle Platoons

Das

Samandar²,

Autry

et al. 2023

IEEE Access

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“…While performance improvements and optimal strategies for managed lanes have received much attention (1,2,5,6,8), inquiries into systemwide operational improvements associated with the implementation of managed lanes in a connected environment have been more limited. Some studies have analyzed managed lanes under a connected environment to understand their impact on tolling, safety, and lane-changing behavior (3,4,17). Furthermore, Abdel-Aty et al (7) built a 3-hour microscopic simulation model to test how deploying CVs under different lane management strategies could improve safety on a Florida freeway stretch.…”

Section: Lane Management Opportunitiesmentioning

confidence: 99%

“…Some studies have analyzed managed lanes under a connected environment to understand their impact on tolling, safety, and lane-changing behavior (3,4,17). Furthermore, Abdel-Aty et al (7) built a 3-hour microscopic simulation model to test how deploying CVs under different lane management strategies could improve safety on a Florida freeway stretch. However, their focus was on safety improvements (7).…”

Section: Lane Management Opportunitiesmentioning

confidence: 99%

“…The advent of vehicle connectivity in transportation promises to improve road safety, mitigate congestion, and create opportunities to manage traffic more efficiently as communication technology enables real-time freeway traffic management. One of the possible applications of traffic management is managed lanes (1)(2)(3)(4)(5)(6)(7)(8). Variable lane eligibility based on known demand (i.e., when the vehicle position and classification are recorded in a connected environment) can potentially support the deployment of connected and autonomous vehicles (CAVs), even at a low market penetration.…”

mentioning

confidence: 99%

“…Performance improvements and deployment strategies for managed lanes have received much attention (1,2,5,6,8). The implementation of managed lanes as a strategy for connectivity deployment has been more limited; however, some studies have analyzed the impacts of managed lanes under a connected environment with different objectives, such as tolling, safety, and lane-changing behavior (3,4,17).…”

mentioning

confidence: 99%

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Lane Management Strategies in a Connected Environment: Analysis of Freight Corridor Scenarios for I-710 in Southern California

Ramirez Ibarra,

Saphores

2023

Transportation Research Record: Journal of the Transportation R

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Connected vehicles (CVs) and their supporting infrastructure are expected to play an important role in the management of traffic congestion. As highway expansion projects are becoming less common, deploying emerging technologies is essential to make the most of the current road infrastructure. Most published studies report that CVs improve traffic performance only marginally. Here, we propose that CVs drive cooperatively with cooperative adaptive cruise control (CACC)-enabled vehicles by designating a CACC lane for periods with high flows of slow-moving heavy-duty drayage trucks. To assess if this approach could help absorb year 2035 projected drayage traffic increases at the Ports of Los Angeles and Long Beach, which is the largest port complex in the U.S.A., we analyze three 2035 scenarios for I-710, a key freeway for freight transportation in Southern California: (1) CACC-enabled vehicles are deployed under mixed traffic conditions; (2) CACC-enabled vehicles are restricted to the first lane (left-most lane); (3) the first lane is reserved for CACC-enabled vehicles, and access is optional. Our results suggest that substantial speed improvements can be obtained, but only when the first lane is CACC reserved with optional access, because this approach creates more platooning opportunities and thus helps maximize the benefits of CACC.

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Safety improvements by intelligent connected vehicle technologies: A meta-analysis considering market penetration rates

Xiao

Lee

Jiang

et al. 2021

Accident Analysis & Prevention

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Safety and operational impact of connected vehicles’ lane configuration on freeway facilities with managed lanes

Cited by 17 publications

References 14 publications

Surrogate Safety Measures: Review and Assessment in Real-World Mixed Traditional and Autonomous Vehicle Platoons

Surrogate Safety Measures: Review and Assessment in Real-World Mixed Traditional and Autonomous Vehicle Platoons

Lane Management Strategies in a Connected Environment: Analysis of Freight Corridor Scenarios for I-710 in Southern California

Safety improvements by intelligent connected vehicle technologies: A meta-analysis considering market penetration rates

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