In this paper we propose a stepwise genetic algorithms approach for optimizing highway alignments for improving computational efficiency and quality of solutions. Our previous work in highway alignment optimization has demonstrated that computational burden is a significant issue when working...

Conventional bus services, which have fixed routes and fixed service schedules, and flexible bus services, which provide doorstep services, have different advantages and disadvantages, with conventional services being generally preferable at high demand densities and flexible services being...

A numerical method has been developed for estimating delays on congested waterways. Analytic and numerical results are presented for series of G/G/1 queues, i.e. with generally distributed arrivals and service times and single chambers at each lock. One or two-way traffic operations are...

We present here a new heuristic for the static multi-vehicle Dial-A-Ride Problem, which we call a rejected-reinsertion heuristic. Its main objective is to minimize the number of vehicles used to satisfy all the demand, subject to service quality constraints. Passenger deviation from desired time...