Dynamic Traffic Assignment III: Distributed Schemes
Date/Time: Tuesday 15:00-16:30
Sponsor: Transportation Science Section
Room: Cascade B
Chair: Athanasios Ziliaskopoulos
Chair Address: Northwestern Univ., Dept. of Civil Eng., Evanston, IL 60208 ,
A Cooperative Decentralized Architecture & A Communication Protocol for Dynamic Traffic Assignment Yaser Hawas, Hani S. Mahmassani --- Univ. of TX, Dept. of Civil Eng., ECJ 6.2, Austin, TX 78712 , (firstname.lastname@example.org)
- We describe a decentralized architecture that utilizes a set of¨ controllers for reactive route guidance. The control logic comprises¨ heuristics together with the breadth-first algorithm. Adjacent¨ controllers share information of the local traffic conditions in¨ their vicinity. A communication protocol is designed to control the¨ information sharing process.
A Common Object Request Broker Architecture-Based Distributed Dynamic Traffic Assignment System for Large-Scale Networks Steven Travis Waller, Athanasios Ziliaskopoulos --- Northwestern Univ., Dept. of Civil Eng., Evanston, IL 60202 ,
- A large-scale design of a DTA model is implemented in the¨ inter-language unification package, a CORBA compliant object¨ oriented distributed system. CORBA handles all communication and¨ synchronization tasks for the system. The distribution of the¨ modules to processors (or processor clusters) is discussed along¨ with computational experience on a cluster of workstations.
ALLIANCE: A Decentralized Approach to System Optimal Routings in Dynamic Traffic Networks Alfredo Garcia, Daniel J. Reaume, Robert L. Smith --- Univ. of MI, Dept. of IOE, Ann Arbor, MI 48109 , (email@example.com)
- We introduce a novel procedure to compute system-optimal routing in¨ a dynamic traffic network. Fictitious play is utilized within a game¨ of identical interests wherein vehicles are treated as players with¨ the common payoff of average trip time experienced. Conditions under¨ which convergence holds are presented as well as results from a¨ large-scale computational test on a real network.
An Integrated Architecture for Real-Time Dynamic Traffic Assignment Yaser Hawas, Hani S. Mahmassani --- Univ. of TX, Dept. of Civil Eng., ECJ 6.2, Austin, TX 78712 , (firstname.lastname@example.org)
- We describe various operational modes of the dynamic traffic¨ assignment system developed at the University of Texas at Austin,¨ including a centralized rolling horizon predictive mode for¨ multiple user classes for both descriptive and normative route¨ guidance as well as a decentralized reactive mode with local search¨ heuristics.
Return to INFORMS home page
Return to Conference home page