The efficient use of infrastructures is a hard requirement for railway companies. Thus, the scheduling of trains should aim toward optimality, which is an NP-hard problem. The paper presents a friendly and flexible computer-based decision support system for railway timetabling. It implements an efficient method, based on meta-heuristic techniques, which provides railway timetables that satisfy ...

In this paper, we review the main concepts and methods to perform capacity analyses, and we present an automated tool that is able to perform several capacity analyses. Capacity is extremely dependent on infrastructure, traffic, and operating parameters. Therefore, an in-depth study of the main factors that influence railway capacity is performed on several Spanish railway infrastructures. The ...

In order to prevent unpleasant incidents, preservation high-speed railway vehicle stability has vital importance. For this purpose, railway vehicle is modeled using a 38-DOF. This paper presents an investigation on limit cycle and bifurcation of high speed railway behavior. It is revealed that the critical hunting speed decreases by increasing the wheel conicity. Also the critical hunting speed...

Railroad-related accidents are more dangerous than other transportation accidents in terms of severity and death rate etc. Therefore more efforts are necessary for improving safety. In the mean time, Korean national railroad has researched and invested continuously such as intelligent safety equipments and level crossing between railroad and highway for decreasing railroad-related accident and ...

Railway control systems are timed and safety-critical. Testing these systems is a key issue. Prior to system testing, the software of a railway control system is tested separately from the hardware. Here we show that real time and scaled time semantics are inefficient for testing this software. We provide a time semantics with simulated time and show that this semantics is more suitable for tes...

49 All these systems have an important common feature: they are safety-critical and must therefore be developed according to the highest safety integrity level (SIL4), as defined in the standards applicable to the railway industry (CENELEC 50126, 50128, 50129, Railway Applications Standards [RAMS, software and electronics]). Apart from being suitable for safety-critical operation, railway syste...

The occurrences of accidents on the railways are inevitable in today’s world and the factors which may cause it, except the atmospheric and accidental ones, are identified and preventable as well. Therefore, these factors can be investigated and useful actions can be performed in order to reduce these accidents. The main impetus of the present research is the statistical analysis of the causes ...

In recent years, there have been requirments for a transport environment that will foster comfortable and safe town development. Studies on urban activities in aging societies with falling birthrates and effective use of public transport modes in addressing environmental problems have become particularly important issues. Public transport is of great importance, especially from the perspective ...

In this paper, we propose a novel graph representation, Railway Visualization, to reveal the information evolution with temporal relationship over time. Through Railway Visualization, it cannot only reveal the changes of an entity’s intra-state over time, but also can effectively disclose the intrinsic characteristics of the complicated relationship evolution, such as branching, crossing, split...