Connect & Drive: design and evaluation of cooperative adaptive cruise control for congestion reduction
TLDR
Using wireless inter-vehicle communications to provide real-time information of the preceding vehicle, in addition to the information obtained by common Adaptive Cruise Control sensors, appears to significantly decrease the feasible time gap, which is shown by practical experiments with a test fleet consisting of six passenger vehicles.Abstract:
Road throughput can be increased by driving at small inter-vehicle time gaps. The amplification of velocity disturbances in upstream direction, however, poses limitations to the minimum feasible time gap. This effect is covered by the notion of string stability. String-stable behavior is thus considered an essential requirement for the design of automatic distance control systems, which are needed to allow for safe driving at time gaps well below 1 s. Using wireless inter-vehicle communications to provide real-time information of the preceding vehicle, in addition to the information obtained by common Adaptive Cruise Control (ACC) sensors, appears to significantly decrease the feasible time gap, which is shown by practical experiments with a test fleet consisting of six passenger vehicles. The large-scale deployment of this system, known as Cooperative ACC (CACC), however, poses challenges with respect to the reliability of the wireless communication system. A solution for this scalability problem can be found in decreasing the transmission power and/or beaconing rate, or adapting the communications protocol. Although the main CACC objective is to increase road throughput, the first commercial application of CACC is foreseen to be in truck platooning, since short distance following is expected to yield significant fuel savings in this case.read more
Citations
More filters
Journal ArticleDOI
Stability and Scalability of Homogeneous Vehicular Platoon: Study on the Influence of Information Flow Topologies
TL;DR: Under linear feedback controllers, a unified internal stability theorem is proved by using the algebraic graph theory and Routh-Hurwitz stability criterion, and the stabilizing thresholds of linear controller gains for platoons are established under a large class of different information flow topologies.
Journal ArticleDOI
Autonomous vehicles: challenges, opportunities, and future implications for transportation policies
TL;DR: In this paper, the authors investigate the challenges and opportunities pertaining to transportation policies that may arise as a result of emerging autonomous vehicle (AV) technologies and propose a conceptual navigation model based on a fleet of AVs that are centrally dispatched over a network.
Journal ArticleDOI
A Review of Communication, Driver Characteristics, and Controls Aspects of Cooperative Adaptive Cruise Control (CACC)
Kakan Dey,Li Yan,Xujie Wang,Yue Wang,Haiying Shen,Mashrur Chowdhury,Lei Yu,Chenxi Qiu,Vivekgautham Soundararaj +8 more
TL;DR: The issues that existing CACC control modules face when considering close to ideal driving conditions are discussed, including how to keep drivers engaged in driving tasks during CACC operations.
Journal ArticleDOI
A Vehicle-Intersection Coordination Scheme for Smooth Flows of Traffic Without Using Traffic Lights
TL;DR: The proposed vehicle-intersection coordination scheme is evaluated through numerical simulation in a typical test intersection consisting of both multilanes and single-lane approaches with turning movements of vehicles and shows significant improvement in intersection performance compared with the traditional signalized intersection scheme.
Proceedings ArticleDOI
An overview of vehicular platoon control under the four-component framework
TL;DR: An overview of vehicular platoon control techniques from networked control perspective is presented, which naturally decomposes a platoon into four interrelated components, i.e., 1) node dynamics (ND), 2) information flow topology (IFT), 3) distributed controller (DC) and, 4) geometry formation (GF).
References
More filters
Journal ArticleDOI
The Impact of Cooperative Adaptive Cruise Control on Traffic-Flow Characteristics
TL;DR: The authors study the impacts of CACC for a highway-merging scenario from four to three lanes and show an improvement of traffic-flow stability and a slight increase in Trafficflow efficiency compared with the merging scenario without equipped vehicles.
Journal ArticleDOI
String-Stable CACC Design and Experimental Validation: A Frequency-Domain Approach
TL;DR: Implementation of the CACC system, the string-stability characteristics of the practical setup, and experimental results are discussed, indicating the advantages of the design over standard adaptive-cruise-control functionality.
Proceedings ArticleDOI
String stability of interconnected systems
D. Swaroop,J.K. Hedrick +1 more
TL;DR: In this paper, the authors introduced the notion of string stability of a countably infinite interconnection of a class of nonlinear systems and derived sufficient ("weak coupling") conditions that guarantee asymptotic string stability.
Journal ArticleDOI
Vehicle-to-Vehicle Communication: Fair Transmit Power Control for Safety-Critical Information
TL;DR: This paper proposes a distributed transmit power control method based on a strict fairness criterion, i.e., distributed fair power adjustment for vehicular environments (D-FPAV), to control the load of periodic messages on the channel and proves the fairness of the proposed approach.
Proceedings ArticleDOI
Design and experimental evaluation of cooperative adaptive cruise control
Jeroen Ploeg,Bart Theodoor Maria Scheepers,Ellen van Nunen,Nathan van de Wouw,Henk Nijmeijer +4 more
TL;DR: Experiments clearly show that the practical results match the theoretical analysis, thereby indicating the possibilities for short-distance vehicle following, and validate the technical feasibility of the resulting control system.