CORRESPONDENCE. THE METROPOLITAN RAILWAYS.

Evaluating the Efficiency of Iranian Regional Railways

Railway transportation plays an important role in the economic development of Iran. National Iranian Railways includes fifteen regional railways which operate independently, but under the supervision of National Iranian Railways Company. Evaluating the efficiency of regional railways is an important issue in Iran and is one of the bases for budget and resource allocation for further developmen...

On Generalized Random Railways

We consider a random generalized railway defined as a random 3-regular multigraph where some vertices are regarded as switches not allowing traffic between any pair of attached edges. It is shown that the probability that the generalized railway is functioning is linear in the proportion of switches. Thus there is no threshold phenomenon for this property.

Safety Functions in Railways

There are several ways to describe and structure safety rules for railways, and a few examples are given in the report. A tentative holistic framework for describing safety features in relation to safety rules is presented. The approach has been applied on rules needed to regulate the communication between different railway organisations and other parties.

High-speed Railways: The Last 10 Years

1 October 2004 is the 40th anniversary of the opening of the Tokaido Shinkansen, the world’s first high-speed railway that marked the start of the era of high-speed rail travel. Ten years ago, the October issue of JRTR 3 published a special feature entitled 30 Years of High Speed Railways. This article summarizes the events in highspeed railways in the last 10 years and discusses their future p...

Prospects for Sustainable Railways