in this paper effects of fractured sleepers on rail track vibration under moving wheelset have been investigated. two parallel rails of the track have been modeled as euler-bernoulli beams on elastic points as rail pads. also sleepers have been modeled as visco-elastic euler-bernoulli beams. it is assumed that, some sleepers under the rail track have been fractured and modeled by two beams. the...

Open access is sometimes seen as promoting rail competition effectively when infrastructure geography and market demand restricts routings — e.g. in Europe. European railways are passenger-oriented, highly scheduled, poorly standardized, and lines serve specialized functions. Conversely, American railroads are freight-oriented, flexible, and highly standardized. Consequently, optimal forms of o...

With reduced environmental impact becoming an increasingly important benefit of the rail transportation mode, continual improvement in efficiency and reduced energy consumption has become a major concern to rail transit operators. For electrified rail transit operations, regenerative braking is one practical way for saving energy because it enables the kinetic energy of a train to be transmitte...

100 Performance analysis of high-speed railway communication systems subjected to co-channel interference and channel estimation errors Jiayi Zhang1,2, Fan Jin3, Zhenhui Tan1,2, Haibo Wang1, Qing Huang1,4, Lajos Hanzo3 Institute of Broadband Wireless Mobile Communications, Beijing Jiaotong University, Beijing 100044, People’s Republic of China State Key Laboratory of Rail Traffic Control and Sa...

Energy issues in transportation systems have garnered increasing attention in recent years in both the public and private sectors. This study proposes a systematic methodology for policy-makers to improve energy consumption efficiency in multimodal intercity transportation systems considering suppliers’ operational constraints and travelers’ mobility requirements. A bi-level optimization model ...

Train braking is a very complex process, specific to rail vehicles and of great importance by the essential contribution on the safety of the traffic. This complexity results from the fact that during braking occur numerous phenomena of different kinds mechanical, thermal, pneumatic, electrical, etc. The actions of these processes take place in various points of the vehicles and act on differen...

Productivity growth in Australia’s railways through the 20 Century was neither smooth nor uniformly positive. It was static or falling for much of the century, before increasing rapidly with dieselisation and the rise of minerals traffic. This paper uses regression analysis to develop an understanding of the factors which drove productivity growth throughout the 20 Century, using a unique datas...

Purpose The aim of this study is to estimate monetary abatement values for road and rail traffic noise that can be used for policy purposes. However, a main objective is to critically discuss the assumptions necessary to convert the monetary values elicited in willingness to pay (WTP) studies to values than can be use for policy purposes. Methods We employ the hedonic regression technique on Sw...

In this paper, dynamic aspects of railway infrastructure operation and maintenance costs in Sweden are explored. Econometric cost functions are estimated to check the robustness of previous marginal cost estimates by introducing lags and leads of both dependent and independent variables. We find support for a forward-looking behaviour within the Swedish National Rail Administration (Banverket) ...

We discuss the mathematical modelling of schedule based rail traffic. The model is used to develop efficient numerical simulation methods for the time optimal control of a large number of interacting trains in a large network. The time optimal control is used to model the realistic behaviour of driving in a network like that of Deutsche Bahn. It is used to allow a real time simulation with inco...