Ziliaskopoulos, A.K. and S. Lee, and S.T. Waller, “A Cell Transmission Based Assignment-Simulation Model for Integrated Freeway/Surface Street Systems,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Diego, CA, May 1997.
Ziliaskopoulos, A.K. and W. Wardell, and S.T. Waller, “An Internet-Based Transit Information System,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Diego, CA, May 1997.
Waller, S.T. and A.K. Ziliaskopoulos, “A CORBA-Based Distributed Dynamic Traffic Assignment System,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Dallas, TX, October 1997.
Waller, S.T. and A.K. Ziliaskopoulos, “Stochastic DTA Problems: Analysis Formulation and Solution Algorithm,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Seattle, WA, October 1998.
Waller, S.T. and A.K. Ziliaskopoulos, “A Linear Model for the Continuous Network Design,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Seattle, WA, October 1998.
Waller, S.T. and A.K. Ziliaskopoulos, “A Stochastic Dynamic Traffic Assignment Model,” TRISTAN III, San Juan, Puerto Rico, June 1998.
Li, Y., A.K. Ziliaskopoulos, and S.T. Waller, “A Linear Programming Approach for the System Optimum DTA Problem for Multiple Destinations & Fixed Arrival Time Demands,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Montreal, Canada, May 1998.
Waller, S.T. and A.K. Ziliaskopoulos, “A Chance-Constrained Based Stochastic DTA Model: Analysis Formulation and Solution Algorithm,” Institute for Operations Research and Management Science (INFORMS) Annual Meeting, Montreal, Canada, May 1998.
Waller, S.T. and A.K. Ziliaskopoulos, “A CORBA-Based Distributed DTA System for Large-Scale Networks,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Montreal, Canada, May 1998.
Waller, S.T., A.K. Ziliaskopoulos, J.S. Mobley, “Properties of Online Shortest Path Problems,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Cincinnati, OH, May 1999.
Waller, S.T., and A.K. Ziliaskopoulos, “A Visual Interactive System for Transportation Applications,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Cincinnati, OH, May 1999.
Waller, S.T. and A.K. Ziliaskopoulos, “A Stochastic Dynamic Network Design Model,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Cincinnati, OH, May 1999.
Waller, S.T. and A.K. Ziliaskopoulos, “A Visual Interactive System for Transportation Applications,” 78th Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 1999.
Waller, S.T., A.K. Ziliaskopoulos, and J.B. Fine, “Insights into Demand Uncertainty in the UE Traffic Assignment Problem,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Antonio, TX, November 2000.
Waller, S.T. and A.K. Ziliaskopoulos, “A Combinatoric Algorithm for the Single-Destination User-Optimal Dynamic Traffic Assignment,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Antonio, TX, November 2000.
(Invited) Waller, S.T., “Multi-Stage Optimization of Stochastic Dynamic Transportation Systems,” The Northwestern University Transportation Center, October 2000.
Chance, E.J., S.T. Waller, A.K. Ziliaskopoulos, and D.E. Boyce, “Solution of an Integrated Freight Network & Input-Output Model,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Salt Lake City, UT, May 2000.
Waller, S.T., A.K. and Ziliaskopoulos, “Optimization of Stochastic Dynamic Transportation Systems,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Salt Lake City, UT, May 2000.
Ziliaskopoulos, K. A. and S.T. Waller, “Modeling Intermodal Freight Movements in the Chicago Area,” Presented at the 42nd Annual Meeting of the Transportation Research Forum, Annapolis, Maryland, November 19- December 01, 2000.
Li, Y. I., S.T. Waller, K. A. Ziliaskopoulos, “Decomposition Scheme for Dynamic Traffic Assignment Models,” 80th Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 2001.
Ziliaskopoulos, A.K. and B. Agrawal, I.Y. Li, and S.T. Waller, “A Simulation Assignment Model to Evaluate Infrastructure Improvements for Freight Operations in the Chicago Area,” Transportation Research Forum, Washington, DC, November 2001.
(Invited) Waller, S.T., “Robust Design and Evaluation of Transportation Networks,” The University of Texas at Austin, November 2001.
Ziliaskopoulos, A.K. and S.T. Waller, H. Shi, “Approaches for the Implementation of Variable Speed Limits,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Miami, FL, October 2001.
Ziliaskopoulos, A.K. and B. Agrawal, I.Y. Li, and S.T. Waller, “A Simulation Assignment Model to Evaluate Infrastructure Improvements for Freight Operations in the Chicago Area,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Miami, FL, October 2001.
Ziliaskopoulos, A.K. and S.T. Waller, “An Internet-Based Geographic Information System that Integrates Data, Models & Users for Transportation Algorithms,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Miami, FL, Oct 2001.
(Invited) Waller, S.T., “Multi-Stage Optimization of Stochastic Dynamic Transportation Systems,” The University of Arizona, March 2001.
(Invited) Waller, S.T., “Multi-Stage Optimization of Stochastic Dynamic Transportation Systems,” The University of Illinois at Urbana-Champaign, March 2001.
(Invited) Waller, S.T., “Multi-Stage Optimization of Stochastic Dynamic Transportation Systems,” The University of Illinois at Chicago, February 2001.
(Invited) Waller, S.T., “Multi-Stage Optimization of Stochastic Dynamic Transportation Systems,” The University of California at Berkeley, February 2001.
Barrett, C., S.T. Waller, and A.K. Ziliaskopoulos, “An Internet –Based Transportation Framework That Integrates Data, Models, and Users,” The 9th World Congress on Intelligent Transport Systems, Chicago, Illinois, October 2002.
Waller, S.T. and H. Golani, “A Combinatorial Approach for Multi-Destination Dynamic Traffic Assignment,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Jose, CA, November 2002.
Waller, S.T. and S. Ukkusuri, “A Linear Program for the User-Optimal Dynamic Traffic Assignment Problem,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, San Jose, CA, November 2002.
Sun, D., S. Ukkusuri R.F. Benekohal, and S.T. Waller, “Modeling of Pedestrian Gap Acceptance for Improving Safety at Uncontrolled Mid-block Crosswalks,” The 82nd Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 2003.
(Invited) Waller, S.T., “Robust Network Equilibrium,” Center of Transportation Research (CTR) Toll Road Symposium, The University of Texas at Austin, April 2003.
Sun, D., R.F. Benekohal, and S.T. Waller, “Multi-objective Traffic Signal Timing Optimization Using Non-dominated Sorting Genetic Algorithms,” The Institute of Electrical and Electronics Engineers (IEEE) Intelligent Vehicle Symposium, Columbus, OH, June 2003.
(Invited) Waller, S.T., “The Online Shortest Path Problem with Limited Arc Dependencies,” The University of Texas at Austin, October, 2003.
Ukkusuri, S. and S.T. Waller, “Dynamic Traffic Network Design Models: Formulations and Examples,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
Ukkusuri, S. and S.T. Waller, “An Analysis of Multi-Destination Dynamic Traffic Equilibrium,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
Ukkusuri, S., V.M. Tom, and S.T. Waller, “Robust Optimization with Traffic Assignment under Demand Uncertainty,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
Waller, S.T., S. Ukkusuri, and S. Hasan, “Decomposition Techniques for the User Optimal Dynamic Traffic Assignment Problem,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
Waller, S.T. and S. Ukkusuri, “Network Equilibrium with Recourse,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
Kumar, D. and S.T. Waller, “Shortest Path Problems with Time Constraints in Stochastic Time-Varying Networks,” Institute for Operations Research and Management Science (INFORMS) Annual Conference, Atlanta, GA, October 2003.
(Invited) Waller, S.T., “Robust Evaluation of Transportation Networks with Equilibrium,” Urban Planning Dept., Symposium on Sustainable Transportation Systems, The University of Illinois at Urbana-Champaign November 2003.
(Invited) Waller, S.T., “Dynamic Transportation Network Modeling,” National Science Foundation (NSF) Tri-Center Workshop on Geographically Distributed Systems, Las Vegas, NV, November 2003.
Sun, D., R. Benekohal, and S.T. Waller, “Multi-objective Evolutionary Algorithms for Intersection Signal Timing Optimization,” 83rd Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 2004.
Ukkusuri, S. and S.T. Waller, “Linear Programming Models for the User and System Optimal Dynamic Network Design Problem: Formulations, Comparisons and Extensions,” 83rd Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 2004.
Golani, H. and S.T. Waller, “A Combinatorial Approach for Multi-Destination Dynamic Traffic Assignment,” 83rd Annual Meeting of the Transportation Research Board (TRB), Washington, DC, January 2004.
Ukkusuri, S. and S.T. Waller, “A User Optimal Dynamic Network Design Model based on a linear Programming Approach,” Transportations Systems Planning and Operations (TRANSPO), Chennai, India February 2004.
Ukkusuri, S., A. Karoonsoontawong, and S. T. Waller, “A Stochastic Dynamic User Optimal Network Design Model accounting for Demand Uncertainty,” Transportations Systems Planning and Operations (TRANSPO), Chennai, India, February 2004.
Waller, S.T., “Dynamic Traffic Models for Earthquake Assessment,” National Science Foundation (NSF) site visit for the Mid-America Earthquake Center, Urbana, IL, June 2004
Ukkusuri, S. and S.T. Waller, “An Expression for long term Demand Uncertainty in the Robust Traffic Assignment Problem,” Tri Annual Symposium on Transportation Analysis (TRISTAN V), Le Gosier, West Guadeloupe, June 2004.
Ukkusuri, S. and S.T. Waller, “Analytical Expressions for the Robust Traffic Equilibrium Problem,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Ukkusuri, S., V. M. Tom, and S.T. Waller, “Evolutionary Algorithms for the Robust Network Design Problems,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Waller, S.T. and S. Ukkusuri, “User Equilibrium with Recourse,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Unnikrishnan, A. and S. Ukkusuri, and S.T. Waller, “Sampling methods for traffic equilibrium problem under demand uncertainty,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Kumar, D. and S.T. Waller, “Stochastic, Time dependent constrainted shortest path algorithms,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Duthie, J., S. Ukkusuri, and S.T. Waller, “Correlated O-D demand under demand uncertainty,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Karoonsoontawong, A. and S.T. Waller, “Analytical Expressions for the Robust Traffic Equilibrium Problem,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Karoonsoontawong, A. and S.T. Waller, “Analytical Expressions for the Robust Traffic Equilibrium Problem,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Jeon, K., S.T. Waller, and S. Ukkusuri “Heuristic Approach for Discrete Network Design Problem Accounting For Dynamic Traffic Assignment Conditions: Formulations, Solution Methodologies, Implementations and Computational Experiences,” Institute for Operations Research and Management Science (INFORMS), Denver, CO, October 2004.
Unnikrishnan, A., S. Ukkusuri, and S.T. Waller, “Sampling Techniques for Evaluating Traffic Equilibrium Problem under Uncertain Demand,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Ukkusuri, S. and S.T. Waller, “Identifying Critical Components for Improving Transportation Systems Security: Modeling Approaches and an Application of Complex Network Science,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Jeon, K., S. Ukkusuri, and S.T. Waller, “Heuristic Approach for Discrete Network Design Problem Accounting for Dynamic Traffic Assignment Conditions: Formulations, solution methodologies, implementations, and Computational Experience,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Ukkusuri, S., S. Karoonsoontawong, S.T. Waller, and K. Kockelman, “Congestion Pricing Technologies: Synthesis and Evaluation Framework,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Karoonsoontawong, A. and S.T. Waller, “Comparison of System- and User-Optimal Stochastic Dynamic Network Design Models Using Monte Carlo Bounding Techniques,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Kumar, D. and S.T. Waller, “Time-Constrained Shortest Path Problem in Stochastic Dynamic Networks,” Presented at the 84th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2005.
Ukkusuri, S., D. Kumar, S.T. Waller, and S. Vishwanath, “Sensor Network Protocols for Asset Routing with Constrained Energy (SPARCE): An Introduction,” Presented at the 62nd Semiannual IEEE Vehicular Technology Conference, Dallas, Texas, September 2005.
Boyles, S. and S.T. Waller, “Online Minimum Variance Routing in Stochastic Networks with One-Step Spatial Dependency,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Duthie, J., A. Unnikrishnan and S.T. Waller, “Accounting for Demand Correlations in the Traffic Assignment Problem,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Ukkusuri, S., S.T. Waller and T. Matthew, “Accounting for Robustness in the Network Design Problem under Uncertain Demand,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Waller, S. T. and S. Ukkusuri, “Approximation Approaches for Evaluating the Traffic Equilibrium Problem under Uncertain Demand,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Ruiz Juri, N. and S.T. Waller, “Quantifying Impacts of Wireless Information in Stochastic system Optimum Network Assignment Problems," Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Unnikrishnan, A., S.T. Waller, J. Duthie and S. Ukkusuri, “Sampling Based Algorithms for the Robust Transport Network Assignment Problems,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Karoonsoontawong, A. and S.T. Waller “A Combined Signal Setting Design and User Optimal Dynamic Traffic Assignment Problem,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Karoonsoontawong, A. and S.T. Waller “Robust Optimization for Bilevel DTA-Based Continuous Network Design Problem,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Waller, S.T., “Dynamic Traffic Modeling on Large-scale Networks,” Presented at the 52nd Annual Meeting of the North American Regional Science Council, Las Vegas, November 10-11, 2005.
Duthie, .J and A. Unnikrishnan, “Network Evaluation with Uncertain and Long term Correlated Demand,” Presented at the 52nd Annual Meeting of the North American Regional Science Council, Las Vegas November 10-11, 2005.
Waller, S.T. and S. Ukkusuri, “User Equilibrium with Recourse in Stochastic Transportation Networks,” Presented at the 2005 INFORMS Annual Meeting, San Francisco, CA, November 13-16, 2005.
Boyles, S., S. Ukkusuri, S.T. Waller, and K. M. Kockelman, “Examining the benefit of Accounting for Traffic Dynamics in Congestion Pricing,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Duthie, J., A. Unnikrishnan, and S. T. Waller, “Network Evaluation with Uncertain and Correlated Long-Term Demand,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Karoonsoontawong, A. and S.T. Waller, “Linear Bi-Level Programming and Metaheuristics for Dynamic Continuous Network Design Problem,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Kumar, D. and S.T. Waller, “The Robust Shortest Path Problem,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Jeon, K., J.S. Lee, S. Ukkusuri and S.T. Waller, “New Approach for Relaxing Computational Complexity of Discrete Network Design Problem Using Selectorecombinative Genetic Algorithm,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Ukkusuri, S. and S.T. Waller, “Single-Point Approximations for Traffic Equilibrium Problem Under Uncertain Demand,” Presented at the 85th Annual Meeting of the Transportation Research Board (TRB) (available in proceedings), January 2006.
Boyles, S.D., S. Ukkusuri, S.T. Waller, and K. Kockelman, “A Comparison of Static and Dynamic Traffic Assignment under Tolls in the Dallas-Fort Worth Region,” Presented at the Transportation Research Board: Innovations in Transportation Modeling Conference, Austin, Texas May 2006.
Ukkusuri, S., S.T. Waller, A. Karoonsoontawong, A. Unnikrishnan, and D. Kumar, “Linear Programming Dynamic Traffic Assignment Models: Formulations, Extensions and Computational Results, Presented at the First International Conference on Dynamic Traffic Assignment, Leeds, U.K. June 2006.