On the Effectiveness of an Opportunistic Traffic Management System for Vehicular Networks

Authors:
Ilias Leontiadis;Gustavo Marfia;David Mack;Giovanni Pau;Cecilia Mascolo;Mario Gerla
Affiliations:
Computer Laboratory, University of Cambridge, Cambridge, U.K.;Department of Computer Science, University of Bologna, Bologna, Italy;Computer Laboratory, University of Cambridge, Cambridge, U.K.;Department of Computer Science, University of California, Los Angeles, CA, USA;Computer Laboratory, University of Cambridge, Cambridge, U.K.;Department of Computer Science, University of California, Los Angeles , CA, USA
Venue:
IEEE Transactions on Intelligent Transportation Systems
Year:
2011

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Abstract

Road congestion results in a huge waste of time and productivity for millions of people. A possible way to deal with this problem is to have transportation authorities distribute traffic information to drivers, which, in turn, can decide (or be aided by a navigator) to route around congested areas. Such traffic information can be gathered by relying on static sensors placed at specific road locations (e.g., induction loops and video cameras) or by having single vehicles report their location, speed, and travel time. While the former approach has been widely exploited, the latter has come about only more recently; consequently, its potential is less understood. For this reason, in this paper, we study a realistic test case that allows the evaluation of the effectiveness of such a solution. As part of this process, (a) we designed a system that allows vehicles to crowd-source traffic information in an ad hoc manner, allowing them to dynamically reroute based on individually collected traffic information; (b) we implemented a realistic network-mobility simulator that allowed us to evaluate such a model; and (c) we performed a case study that evaluates whether such a decentralized system can help drivers to minimize trip times, which is the main focus of this paper. This study is based on traffic survey data from Portland, OR, and our results indicate that such navigation systems can indeed greatly improve traffic flow. Finally, to test the feasibility of our approach, we implemented our system and ran some real experiments at UCLA's C-Vet test bed.