In this thesis we examine how fuel price variation affects the optimal mix of services in intercity transportation. Towards this end, we make two main contributions. The first is the development of an analytic total logistics cost model of intercity transportation, which is sensitive to fuel price and incorporates multiple classes of vehicles serving passengers with differentiated values of tim...

The WorldFIP protocol is based on a centralised medium access control mechanism, where a specific station, the bus arbitrator (BA), controls all data transfers between different stations. At configuration time, the BA is given a list of process variables to scan along with their corresponding periods. This piece of information is known as the bus arbitrator table. In this paper we provide a com...

In a multi-channelphotonic dual bus network, each unidirectional bus contains a control channel and several data channels (wavelengths), and each station has n tunable transmitters and nz tunable receivers. Given a set of serving traffic and a set of new traffic requests, the wavelength assignment problem ( ( n , ni)-WAP) is to assign the transmission wavelengths and receiving wavelengths of ea...

In this paper, we present a load balancing protocol in the context of a CSMA/CD local area network. The main objective of this protocol is to achieve efficient load balancing among a group of homogeneous processing sites, interconnected by an Ethernet LAN. Usually when the bus load in such networks approaches bus capacity, the mean packet delay increases rapidly. Thus, some time-critical messag...

This study aims at identifying the differences of crash characteristics at basic segments between urban and intercity expressways. Crash rate (CR) model is firstly developed as a function of traffic density. The causes leading to different CR characteristics by expressway type are then examined considering the interaction of geometry, traffic flow and ambient conditions. Affecting mechanisms of...

The IEEE 802.4 token bus protocol requires each network station to implement a Synchronous (highest priority) message class, and permits a station to implement three lower priority classes: Urgent Asynchronous, Normal Asynchronous, and Time Available. If a station implements the priority option, then the objective is to allocate bandwidth to lower priority frames only after transmission of high...

Intelligent Transportation Systems (ITS) are gaining recognition in developing countries like India. This paper describes the various components of our prototype implementation of a Real-time Passenger Information System (RTPIS) for a public transport system like a fleet of buses. Vehicle-mounted units, bus station units and a server located at the transport company premises comprise the system...