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Traffic and Networks Research Laboratory

Welcome to the web site of the Traffic and Networks Research Laboratory (TNRL) of Center for Intelligent Systems Research (CISR) at GWU.  The research capabilities of this laboratory have been expanded significantly in recent years by the Lab director, Prof. Samer Hamdar.  This site is still under construction, but in its present form, provides a brief overview of the activities and capabilities of TNRL.

Research areas of Traffic and Networks Research Laboratory include:

(1)        Driver behavior modeling

(2)        Traffic flow theory and control

(3)        Networks flow problems and dynamic traffic assignment

(4)        Pedestrian flow modeling and detection.

Special focus is given to transportation safety and sustainability with research in emission modeling and air pollution propagation, driver decision making under uncertainty, disaster management and evacuation modeling. 

This laboratory contains software packages, sensors and controllers found in state-of-the art Traffic Management Centers.


Sample Research Projects

Some research projects conducted in the laboratory and funded by agencies like the Federal Highway Administration (FHWA) and the National Science Foundation (NSF) are:

(1)        Data fusion techniques for heterogeneous sensor technologies

(2)        Analysis of a comprehensive approach to congestion management

(3)        Evaluation of new sensor technologies

(4)        Measuring, evaluating and predicting the safety impact of road infrastructure systems on driver behavior.


Software/Hardware/Instrumentation Capabilities

TNRL is equipped with a host of PCs, workstations, and computing facilities with the latest traffic modeling and simulation software.  Sensors and controllers are also obtained for experimentation.  In addition, under funding from the National Science Foundation, the laboratory is developing a new Instrumented Vehicle for track and field operational tests and experimentation of driver behavior.  The present and planned equipment and software are as follows:

 

Workstations:

·       Dell Precision Workstation T7400 - 64bit, Quad Core Intel® Xeon® Processor E5430 (2.66GHz,2X6M L2, 1333)

·       Dell Precision Workstation 690 (1KW - 64bit), Quad Core Intel® Xeon® Processor X5355 (2.66GHz, 2 X 4MB L2,1333), Genuine Windows Vista® Ultimate 64-bit, with Media

Servers:

·       PowerEdge 2900 Quad Core Intel® Xeon® X5355, 2x4MB Cache, 2.66GHz, 1333MHz FSB, Enterprise x64 Edition SP2

·       PowerEdge 6800 2.6GHz/800Mhz/4mb Cache, Dual-Core Intel® Xeon 7110M Processor, Enterprise x64 Edition SP2, Academic, 25 CALs

Data Collection Instrumentation:

Sensors:

Microwave, acoustic, and vision sensors are available for system development and deployment studies. These sensors will collect data to be used in a variety of research projects. Simulation packages use this data to create realistic scenarios for the research projects.  Some of the sensing capabilities of this laboratory have been made possible by generous donations of equipment by:

 

Software:

The latest of the following software are available for modeling and simulation, testing, and evaluation of traffic flow problems:

·       AIMSUN

·       CORSIM

·       VISSIM

 

Instrumented Vehicle:

A fully equipped instrumented vehicle is under development for microscopic trajectories and macroscopic trip characteristics, driver behavior modeling, and testing and evaluation of intelligent in-vehicle and driver assistance systems.

 


Sample List of Publications/Presentations

Refereed Archival Journal Publications

1.     Talebpour, A, Mahmassani, H. S. and Hamdar, S. H. "A Multi-Regime Sequential Risk-Taking Model of Car-Following Behavior: Specification, Calibration and Sensitivity Analysis". Transportation Research Board Meeting (90th: 2011: Washington, D.C., USA). Preprint CD-ROM. Submitted for publication in Transportation Research Record.

2.     Hamdar, S. H. and Mahmassani H. S.. "Life in the Fast Lane: A Duration-Based Investigation of Driver Behavior Differences across Freeway Lanes". Transportation Research Record, No. 2124, pp. 89-102, 2009.

3.     Hamdar, S. H., Treiber, M., Mahmassani, H. S., and Kesting A. "Modeling Driver Behavior as a Sequential Risk Taking Task". Transportation Research Record, No. 2088, pp. 208-217, 2008.

4.     Johansson A., Chan, S. H. Y., Hamdar, S. H., Al-Bosta, S., Haase, K. and Helbing, D. "Towards Automatic Analysis and Forecasting of Pilgrim Flows by Video Processing and Simulation", Journal of the Central Directorate for Development of Projects -Holy Areas, Ministry of Municipal and Rural Affairs, Riyadh, Kingdom of Saudi Arabia, December 2007.

5.     Hamdar, S. H. and Mahmassani, H. S. "From Existing Accident-Free Car-Following Models to Colliding Vehicles: Exploration and Assessment". Transportation Research Record (TRR), No. 2088, pp. 45-56, 2008.

6.     Hamdar, S. H., Mahmassani, H. S and Chen, R. B., "Aggressiveness Propensity Index for Driving Behavior at Signalized Intersections". Accident Analysis & Prevention, Volume 40, Issue 1, pp. 315-326, 2008

Refereed Conference Proceedings

1.     Vinayak, D, Hamdar, S. H. and Pande A. "Generalized Two-Fluid Model for Freeway and Arterial Traffic". NSF CMMI Innovation and Research Conference, Atlanta, GA, USA, January 4-7, 2011.

2.     Hamdar, S. H., Zhang K., Mahmassani, H. S and Zeeshan. M. "A Coordinated Control System for Emergency Evacuation". National Evacuation Conference 2010 Proceedings, New Orleans, February 2010.

3.     Hamdar, S. H., Mahmassani, H. S and Treiber. M. "Individual Variations versus Collective Traffic Patterns: Heterogeneity Effect in a Risk-Taking Environment". Transportation Research Board Meeting (89th: 2010: Washington, D.C.). Preprint CD-ROM.

4.     Hamdar, S. H., Treiber, M. and Mahmassani, H. S. "From Human Perception to Traffic Collisions: Modeling Driver Behavior in a Risk-Taking Environment". Traffic and Granular Flow 2009 Proceedings, Shanghai, China, June 2009.

5.     Hamdar, S. H., "From an Accident-Free Environment to Colliding Vehicles: Modeling Driver Behavior as a Sequential Risk-Taking Task". Proceedings of the 2nd FHWA/UTC/RITA Conference on Traffic Management, Turner-Fairbank Highway Research Center, Mc. Lean, Virginia, USA, May 2009.

6.     Hamdar, S. H., Treiber, M. and Mahmassani, H. S. "Calibration of a Stochastic Car Following Model Using Trajectory Data: Exploration and Model Properties". Transportation  Research Board Meeting (88th: 2009 : Washington, D.C.). Preprint CD-ROM.

7.     Hamdar, S. H. and Mahmassani, H. S. "Driver Car Following Behavior: From a Discrete Event Process to a Continuous Set of Episodes". National Research Council (U.S.); Transportation Research Board Meeting (87th: 2008 : Washington, D.C.). Preprint CD-ROM.

8.     Hamdar, S. H., Treiber, M., Mahmassani, H. S., and Kesting A. "Modeling Driver Behavior as a Sequential Risk Taking Task". National Research Council (U.S.). Transportation Research Board Meeting (87th: 2008 : Washington, D.C.). Preprint CD-ROM.

9.     Hamdar, S. H. and Mahmassani, H. S. "Colliding Particles: Beyond Accident-Free Car Following Model", Traffic and Granular Flow 2007 Proceedings, Paris-Orsay, France, June 2007.

10.  Hamdar, S. H., Mahmassani, H. S., and Chen, R. B. "Aggressiveness Propensity Index for Driving Behavior at Signalized Intersections". National Research Council (U.S.). Transportation Research Board Meeting (86th: 2007: Washington, D.C.); Preprint CD-ROM.


Contact

For more information about this laboratory, please contact its Director:

Prof. Samer Hamdar, Assistant Professor of Civil Engineering

Civil and Environmental Engineering (CEE)

Email: hamdar@gwu.edu

Phone: (703) 726-8373   (GW Virginia Science and Technology Campus, Ashburn, VA)

(202) 994-6652   (GW Main Campus, Washington DC)

Address

The George Washington University Virginia Science and Technology Campus

Exploration Hall

Traffic and Networks Research Laboratory (TNRL)- CISR

20101 Academic Way

Ashburn, VA 20147-2604 USA

 

For the list of students, faculty, and collaborators, please see the CISR links.