A vehicle speed harmonization strategy for minimizing inter-vehicle crash risks
- Authors
- Park, Hyunjin; Oh, Cheol
- Issue Date
- Jul-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Risk estimation; Speed control; Risk map; Risk minimization; Vehicle trajectory data
- Citation
- ACCIDENT ANALYSIS AND PREVENTION, v.128, pp 230 - 239
- Pages
- 10
- Indexed
- SSCI
SCOPUS
- Journal Title
- ACCIDENT ANALYSIS AND PREVENTION
- Volume
- 128
- Start Page
- 230
- End Page
- 239
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/2776
- DOI
- 10.1016/j.aap.2019.04.014
- ISSN
- 0001-4575
1879-2057
- Abstract
- Recent technological advancements have facilitated the implementation of speed harmonization based on connected and automated vehicles (CAV) to prevent crashes on the road. In addition, trajectory-level vehicle controls are receiving substantial attention as sensors, wireless communications, and control systems are rapidly advancing. This study proposes a novel vehicle speed control strategy to minimize inter-vehicle crash risks in automated driving environments. The proposed methodology consists of the following three components: a risk estimation module, a risk map construction module, and a vehicle speed control module. The essence of the proposed strategy is to adjust the subject vehicle speed based on an analysis of the interactions among a subject vehicle and the surrounding vehicles. Crash risks are quantified by a fault tree analysis (FTA) method to integrate the crash occurrence potential and crash severity at every time step. A crash risk map is then constructed by projecting the integrated risk of the subject vehicle into a two-dimensional space composed of relative speed and relative spacing data. Next, the vehicle speed is continuously controlled to reach the target speed using risk map analysis to prevent a crash. The performance of the proposed methodology is evaluated by a VISSIM simulator with various traffic congestion levels and market penetration rates (MPR) of controlled vehicles. For example, an approximate 50% reduction rate of the crash potential was achievable without a loss of the operational performance of the traffic stream when all vehicles were controlled by the proposed methodology under the level of service (LOS) C conditions. This study is meaningful in that vehicle speed control is performed for the pus pose of speed harmonization in a traffic stream based on a comprehensive analysis of inter-vehicle risks. It is expected that the outcome of this study will be valuable for supporting the development of vehicle control systems for preventing crashes in automated driving environments.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF TRANSPORTATION AND LOGISTICS ENGINEERING > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/2776)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.