01659508

Component

Vehicular traffic congestion in a vehicle-to-vehicle (V2V) communication environment can lead to congestion effects for information flow propagation. Such congestion effects can impact whether a specific information packet of interest can reach a desired location, and if so, in a timely manner to influence the traffic system performance. This paper aims to characterize the information flow propagation wave (IFPW) for an information packet in a congested V2V communication environment under an information relay control strategy. This strategy seeks to exclude information that is dated in the communication buffer under a first-in, first-out queue discipline, from being relayed if the information flow regime is congested. A macroscopic two-layer model is proposed to characterize the IFPW. The upper layer is formulated as integro-differential equations to characterize the information dissemination in space and time under this control strategy. The lower layer adopts the Lighthill-Whitham-Richards model to capture the traffic flow dynamics. A necessary condition for existence of IFPW is derived which quantifies the expected time that needs to be reserved for broadcasting the information packet of interest so as to ensure the formation of an IFPW. The asymptotic IFPW speed and the asymptotic density of informed vehicles (those that have received the information of interest) are analytically explored in this study, which help in evaluating the timeliness of information propagation and the influence of traffic dynamics on information propagation. The proposed model can aid in the design of traffic management strategies built upon the timely propagation of information through V2V communication.

This paper was sponsored by TRB committee ADB30 Standing Committee on Transportation Network Modeling.

18-00695

English

18p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Physical distribution; Traffic congestion; Traffic flow; Traffic models; Vehicle to vehicle communications; Wave motion

Information flow

Data and Information Technology; Highways; Operations and Traffic Management; Planning and Forecasting

Transportation Research Board Annual Meeting 2018 Paper #18-00695

TRIS, TRB, ATRI

Jan 8 2018 10:11AM