Document Type
Dissertation
Date of Award
Spring 5-31-2010
Degree Name
Doctor of Philosophy in Civil Engineering - (Ph.D.)
Department
Civil and Environmental Engineering
First Advisor
I-Jy Steven Chien
Second Advisor
Athanassios K. Bladikas
Third Advisor
Janice Rhoda Daniel
Fourth Advisor
Jerome M. Lutin
Fifth Advisor
Lazar Spasovic
Abstract
The methodology developed in this dissertation attempts to optimize integrated service that minimizes the total cost, including user and supplier costs, of a transit route with heterogeneous demand. While minimizing total cost, a set of practical constraints, such as capacity, operable fleet size and frequency conservation, are considered.
The research problem is presented in three scenarios, consisting of various service patterns (e.g., all-stop, short-turn and express) under heterogeneous demand. A logit-based model was used to estimate passenger transfer demand. An exhaustive search method was developed to find the optimal solutions for a simplified transit route with six stops, and a Genetic Algorithm (GA) was developed to find the optimal solution for a real-world, large scale transit route. The optimized variables include the combination of service patterns, the associated service frequencies, and stops skipped by the express service.
A six-stop transit route was designed and analyzed via a proof-of-concept demonstration to ensure that the developed models are capable of finding the optimal solutions. A sensitivity analysis was conducted, which enables transit planners to quantify the impact of various model parameters (e.g., user value of time, vehicle capacity, operating cost, etc.) to the decision variables and the objective function. Finally, the developed models and solution algorithm were applied to optimize integrated service for a real world bus route in New Jersey.
Recommended Citation
Ulusoy, Yavuz Yusuf, "Optimizing integrated service for a transit route with heterogeneous demand" (2010). Dissertations. 220.
https://digitalcommons.njit.edu/dissertations/220
