Object-oriented model of railway stations operation

Routing Trains Through Railway Stations: Model Formulation and Algorithms

In this paper we consider the problem of routing trains through railway stations. This problem occurs as a subproblem in a project which the authors are carrying out in cooperation with the Dutch railways. The project involves the analysis of future infrastructural capacity requirements in the Dutch railway network. Part of this project is the automatic generation and evaluation of timetables. ...

Formal operation definition in object-oriented databases

ion of the result of an expression, it is obvious that without result, a type for an expression is irrelevant. Obviously, there is more to heterogeneity than just the addition or modification of typing rules. It has a profound impact on the meaning of a type, hence on the meaning of expressions. In Section 5.3.6, we have seen that heterogeneity is one of the causes of update anomalies if not pr...

A mathematical model for finding the optimal locations of railway stations

Regarding the importance of competitive advantages among the transportation systems, improving the costumer’s satisfaction is an important factor in attracting them to these systems. In this research, we focus on the effects of constructing new stations on users and a new mathematical model is proposed for this problem. In the proposed model, two simultaneous effects on customers by constructin...

Modelling Interlocking Systems for Railway Stations

Capacity utilisation and performance at railway stations

As traffic levels increase on railways in Britain and elsewhere, improved understanding of the trade-offs between capacity provision/utilisation and service quality is increasingly important, as Infrastructure Managers and Railway Undertakings seek to maximise capacity provision without an unacceptable loss of service reliability and punctuality. This is particularly true of the stations and ju...