Select Publications

Journal articles

Fajardo D; Waller ST, 2012, 'Dynamic traveling salesman problem in stochastic-state network setting for search-and-rescue application', Transportation Research Record, pp. 122 - 130, http://dx.doi.org/10.3141/2283-13

Fajardo D; Waller ST, 2012, 'Finding Minimum-Cost Dynamic Routing Policies in Stochastic-State Networks with Link Failures', Transportation Research Record, pp. 113 - 121, http://dx.doi.org/10.3141/2283-12

Kumar R; Unnikrishnan A; Waller ST, 2012, 'Heuristic Scheme for Heterogeneous Vehicle Routing Problem on Trees Based on Generalized Assignment and Bin-Packing Upper Bounds', Transportation Research Record, pp. 1 - 11, http://dx.doi.org/10.3141/2283-01

Ferguson EM; Duthie J; Unnikrishnan A; Waller ST, 2012, 'Incorporating equity into the transit frequency-setting problem', Transportation Research Part A - Policy and Practice, 46, pp. 190 - 199, http://dx.doi.org/10.1016/j.tra.2011.06.002

Gardner LM; Fajardo D; Waller ST, 2012, 'Inferring Infection-Spreading Links in an Air Traffic Network', Transportation Research Record, pp. 13 - 21, http://dx.doi.org/10.3141/2300-02

Gao L; Xie C; Zhang Z; Waller ST, 2012, 'Network-level road pavement maintenance and rehabilitation scheduling for optimal performance improvement and budget utilization', Computer-Aided Civil and Infrastructure Engineering, 27, pp. 1 - 12, http://dx.doi.org/10.1111/j.1467-8667.2011.00733.x

Xie C; Waller ST, 2012, 'Optimal Routing with Multiple Objectives: Efficient Algorithm and Application to the Hazardous Materials Transportation Problem', Computer-Aided Civil and Infrastructure Engineering, 27, pp. 77 - 94, http://dx.doi.org/10.1111/j.1467-8667.2011.00720.x

Xie C; Waller ST, 2012, 'Parametric Search and Problem Decomposition for Approximating Pareto-Optimal Paths', Transportation Research Part B - Methodological, 46, pp. 1043 - 1067, http://dx.doi.org/10.1016/j.trb.2012.03.005

Jiang N; Xie C; Waller ST, 2012, 'Path-Constrained Traffic Assignment: Model and Algorithm', Transportation Research Record, pp. 25 - 33, http://dx.doi.org/10.3141/2283-03

Xie C; Waller ST, 2012, 'Stochastic traffic assignment, Lagrangian dual, and unconstrained convex optimization', Transportation Research Part B - Methodological, 46, pp. 1023 - 1042, http://dx.doi.org/10.1016/j.trb.2012.03.003

Junsik P; Jumsan K; LIN D-Y; WALLER ST, 2011, 'Job Satisfaction and Service Quality of Bus Drivers in Korea', Asian Transport Studies, 1, pp. 250 - 261, http://dx.doi.org/10.11175/eastsats.1.250

Lin DY; Karoonsoontawong A; Waller ST, 2011, 'A Dantzig-Wolfe Decomposition Based Heuristic Scheme for Bi-level Dynamic Network Design Problem', Networks and Spatial Economics, 11, pp. 101 - 126, http://dx.doi.org/10.1007/s11067-008-9093-4

Lin DY; Valsaraj V; Waller ST, 2011, 'A Dantzig-Wolfe Decomposition-Based Heuristic for Off-line Capacity Calibration of Dynamic Traffic Assignment', Computer - Aided Civil and Infrastructure Engineering, 26, pp. 1 - 15, http://dx.doi.org/10.1111/j.1467-8667.2009.00635.x

Lin DY; Unnikrishnan A; Waller ST, 2011, 'A Dual Variable Approximation Based Heuristic for Dynamic Congestion Pricing', Networks and Spatial Economics, 11, pp. 271 - 293, http://dx.doi.org/10.1007/s11067-009-9124-9

Xie C; Kockelman K; Waller ST, 2011, 'A maximum entropy-least squares estimator for elastic origin-destination trip matrix estimation', Transportation Research Part B - Methodological, 45, pp. 1465 - 1482, http://dx.doi.org/10.1016/j.trb.2011.05.018

Fajardo D; Au T-C; Waller ST; Stone P; Yang CYD, 2011, 'Automated Intersection Control: Performance of Future Innovation Versus Current Traffic Signal Control', Transportation Research Record, pp. 223 - 232, http://dx.doi.org/10.3141/2259-21

Kumar R; Unnikrishnan A; Waller ST, 2011, 'Capacitated-Vehicle Routing Problem with Backhauls on Trees: Model, Properties, Formulation, and Algorithm', Transportation Research Record, pp. 92 - 102, http://pubsindex.trb.org/view/2011/C/1092625

Ng M; Szeto WY; Waller ST, 2011, 'Distribution-free Travel Time Reliability Assessment with Probability Inequalities', Transportation Research Part B - Methodological, 45, pp. 852 - 866, http://www.sciencedirect.com/science/article/pii/S0191261511000348

Sun D; Lv J; Waller ST, 2011, 'In-depth Analysis of Traffic Congestion Using Computational Fluid Dynamics (CFD) Modeling Method', Journal of Modern Transportation, 19, pp. 58 - 67, http://dx.doi.org/10.3969/j.issn.2095-087X.2011.01.009

Sun D; Lv J; Waller ST, 2011, 'In-depth analysis of traffic congestion using computational fluid dynamics (CFD) modeling method', Journal of Modern Transportation, 19, pp. 58 - 67, http://dx.doi.org/10.1007/bf03325741

Duthie JC; Unnikrishnan A; Waller ST, 2011, 'Influence of Demand Uncertainty and Correlations on Traffic Predictions and Decisions', Computer - Aided Civil and Infrastructure Engineering, 26, pp. 16 - 29, http://dx.doi.org/10.1111/j.1467-8667.2009.00637.x

Zhang T; Xie C; Waller ST, 2011, 'Integrated Equilibrium Travel Demand Model with Nested Logit Structure: Fixed-Point Formulation and Stochastic Analysis', Transportation Research Record, pp. 79 - 96, http://trb.metapress.com/content/c7452gw78g8081x8/

Gao L; Xie C; Zhang Z; Waller ST, 2011, 'Integrated Maintenance and Expansion Planning for Transportation Network Infrastructure', Transportation Research Record, 2225, pp. 56 - 64, http://dx.doi.org/10.3141/2225-07

Xie C; Waller ST; Kockelman K, 2011, 'Intersection Origin-Destination Flow Optimization Problem for Evacuation Network Design', Transportation Research Record: Journal of the Transportation Research Board, pp. 105 - 115, http://dx.doi.org/10.3141/2234-12

Vorugant A; Unnikrishnan A; Waller ST, 2011, 'Modeling Carrier Collaboration in Freight Networks', Transportation Letters: The International Journal of Transportation Research, 3, pp. 51 - 61, http://dx.doi.org/10.3328/TL.2011.03.01.51-61

Boyles SD; Waller ST, 2011, 'Optimal Information Location for Adaptive routing', Networks and Spatial Economics, 11, pp. 233 - 254, http://www.springer.com/economics/regional+science/journal/11067

Boyles SD; Voruganti A; Waller ST, 2011, 'Quantifying Distributions of Freeway Operational Metrics', Transportation Letters: The International Journal of Transportation Research, 3, pp. 21 - 36, http://dx.doi.org/10.3328/TL.2011.03.01.21-36

Gardner LM; Boyles SD; Waller ST, 2011, 'Quantifying the benefit of responsive pricing and travel information in the stochastic congestion pricing problem', Transportation Research Part A - Policy and Practice, 45, pp. 204 - 218, http://dx.doi.org/10.1016/j.tra.2010.12.006

Ng M; Zhang Z; Waller ST, 2011, 'The Price of Uncertainty in Pavement Infrastructure Management Planning: An integer Programming Approach', Transportation Research Part C - Emerging Technologies, 19, pp. 1326 - 1338, http://www.sciencedirect.com/science/article/pii/S0968090X11000490

Karoonsoontawong A; Ukkusuri S; Waller ST; Kockelman KM, 2010, 'A Simulation-Based Approximation Algorithm for Dynamic Marginal Cost Pricing', Journal of the Transportation Research Forum, 47, http://dx.doi.org/10.5399/osu/jtrf.47.4.1131

Suescun DR; Lin DY; Vajdic N; Waller ST; Damnjanovic I, 2010, 'Identification of competing and feeder links and routes in a toll road context', Transportation Research Record, pp. 120 - 130, http://dx.doi.org/10.3141/2196-13

Vajdic N; Damnjanovic I; Suescun DR; Travis Waller S, 2010, 'Impact of network improvement on revenue performance and bonding costs of toll roads', Transportation Research Record, pp. 8 - 15, http://dx.doi.org/10.3141/2187-02

Karoonsoontawong A; Waller ST, 2010, 'Integrated Network Capacity Expansion and Traffic Signal Optimization Problem: Robust Bi-level Dynamic Formulation', Networks and Spatial Economics, 10, pp. 525 - 550, http://dx.doi.org/10.1007/s11067-008-9071-x

Xie C; Kockelman KM; Waller ST, 2010, 'Maximum entropy method for subnetwork origin-destination trip matrix estimation', Transportation Research Record, pp. 111 - 119, http://dx.doi.org/10.3141/2196-12

Duthie J; Voruganti A; Kockelman K; Waller ST, 2010, 'Highway improvement project rankings due to uncertain model inputs: Application of traditional transportation and land use models', Journal of Urban Planning and Development, 136, pp. 294 - 302, http://dx.doi.org/10.1061/(ASCE)UP.1943-5444.0000026

Ng MW; Park J; Waller ST, 2010, 'A Hybrid Bilevel Model for the Optimal Shelter Assignment in Emergency Evacuations', Computer-Aided Civil and Infrastructure Engineering, 25, pp. 547 - 556, http://dx.doi.org/10.1111/j.1467-8667.2010.00669.x

Boyles SD; Waller ST, 2010, 'A mean-variance model for the minimum cost flow problem with stochastic arc costs', Networks, 56, pp. 215 - 227, http://dx.doi.org/10.1002/net.20374

Nezamuddin N; Crunkleton JL; Tarnoff PJ; Waller ST, 2010, 'Speed distribution profile of traffic data and sample size estimation', Traffic Engineering and Control, 51, pp. 147 - 152

Boyles SD; Zhang Z; Waller ST, 2010, 'Optimal maintenance and repair policies under nonlinear preferences', Journal of Infrastructure Systems, 16, pp. 11 - 20, http://dx.doi.org/10.1061/(ASCE)1076-0342(2010)16:1(11)

Xie C; Lin DY; Travis Waller S, 2010, 'A dynamic evacuation network optimization problem with lane reversal and crossing elimination strategies', Transportation Research Part E: Logistics and Transportation Review, 46, pp. 295 - 316, http://dx.doi.org/10.1016/j.tre.2009.11.004

Ng MW; Travis Waller S, 2010, 'A static network level model for the information propagation in vehicular ad hoc networks', Transportation Research Part C: Emerging Technologies, 18, pp. 393 - 407, http://dx.doi.org/10.1016/j.trc.2010.02.006

Ukkusuri SV; Waller ST, 2010, 'Approximate analytical expressions for transportation network performance under demand uncertainty', Transportation Letters, 2, pp. 111 - 123, http://dx.doi.org/10.3328/TL.2010.02.02.111-123

Boyles SD; Kockelman KM; Travis Waller S, 2010, 'Congestion pricing under operational, supply-side uncertainty', Transportation Research Part C: Emerging Technologies, 18, pp. 519 - 535, http://dx.doi.org/10.1016/j.trc.2009.09.006

Xie C; Waller ST, 2010, 'Estimation and application of a Bayesian network model for discrete travel choice analysis', Transportation Letters, 2, pp. 125 - 144, http://dx.doi.org/10.3328/TL.2010.02.02.125-144

Ng MW; Kockelman KM; Waller ST, 2010, 'Relaxing the multivariate normality assumption in the simulation of transportation system dependencies: An old technique in a new domain', Transportation Letters, 2, pp. 63 - 74, http://dx.doi.org/10.3328/TL.2010.02.02.63-74

Ng MW; Waller ST, 2010, 'Reliable evacuation planning via demand inflation and supply deflation', Transportation Research Part E: Logistics and Transportation Review, 46, pp. 1086 - 1094, http://dx.doi.org/10.1016/j.tre.2010.04.001

Ng M; Waller ST, 2010, 'A computationally efficient methodology to characterize travel time reliability using the fast Fourier transform', Transportation Research Part B: Methodological, 44, pp. 1202 - 1219, http://dx.doi.org/10.1016/j.trb.2010.02.008

Gardner LM, 2010, 'Solution Methods for Robust Pricing of Transportation Networks under Uncertain Demand', Transportation Research Part C - Emerging Technologies, 18, pp. 656 - 667, http://www.sciencedirect.com/science/article/pii/S0968090X09001168

Unnikrishnan A; Waller ST, 2009, 'Freight transportation network design problem for maximizing throughput under uncertainty', Transportation Research Record, pp. 105 - 114, http://dx.doi.org/10.3141/2090-12

Unnikrishnan A; Waller ST, 2009, 'User equilibrium with recourse', Networks and Spatial Economics, 9, pp. 575 - 593, http://dx.doi.org/10.1007/s11067-009-9114-y


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