To route and schedule trains over a large complex network can be computationally intensive. One way to reduce complexity could be to "aggregate" suitable sections of a network. In this paper, we present a simulation-based technique to generate delay estimates over track segments as a function of...

A set of agricultural suppliers with low demands can save on long-haul transportation costs by consolidating their product. We consider a system with stochastic demand and a single consolidation point near the suppliers. We propose a look-ahead heuristic that takes advantage of economies of...

Transit agencies are currently seeking ways to improve service flexibility in a cost efficient manner. Mobility Allowance Shuttle Transit is a transportation concept that merges the flexibility of Demand Responsive Transit systems with the low cost operability of fixed-route bus systems. In this...

Since the enactment of the Americans with Disabilities Act in 1991 operating expenses for demand responsive transit have more than doubled as demand for this mandated service has expanded. Many advanced technologies and management practices have been proposed and implemented to improve the...

Over the past 10 years, operating expenses for demand responsive transit (DRT) have more than doubled as demand for this mandated service has expanded. The DRT systems that we studied consist of dial-a-ride programs that transit agencies use for point-to-point pick-up and delivery of the elderly...

Container movement by trucks with time constraints at origins and destinations is modeled as an asymmetric "multi-Traveling Salesmen Problem with Time Windows" (m-TSPTW) with social constraints. A two-phase exact algorithm based on dynamic programming (DP) is proposed that finds the best routes...

Over the past 10 years, operating expenses for Demand Responsive Transit have more than doubled as demand for this mandated service has expanded. Many advanced technologies and management practices have been proposed and implemented to improve the efficiency of the service; but, evidence for the...

This report describes a simulation model developed to evaluate the impact of using Intelligent Transportation Systems (ITS), such as Global Positioning Systems (GPS) for bus tracking, on controlling buses in wide-area transit networks. Control strategies with ITS will be compared against those...