TRACKING the twists and turns of the world railway industry month after month remains a constant challenge. One publication that we find invaluable in this task is Railway Directory.This month sees the publication of the 112th edition, with more than 4 000 entries covering railway, metro and light rail operators, infrastructure managers, as well as equipment suppliers, consultants and service providers. Also listed are statutory bodies responsible for transport policy, industry associations and key industry personnel. Compiled and edited for us by Chris Bushell, Railway Directory includes a full suite of geographical colour maps, covering all the world’s railways and many city rail networks. Railway Directory is also available online at www.railwaydirectory.net, which is updated weekly to reflect the latest changes to the industry. You can order the book or subscribe to the web service on line, or contact our sales agency ESCO Business Services (p16). H Railway Gazette International has been selected as media partner for the 57th UITP World Congress and Mobility & City Transport exhibition, which will take place in Helsinki on May 21-24. The rail, metro and light rail sector plays an increasingly important role in urban public transport, as explained by UITP Secretary-General Hans Rat on p21, and we are delighted to add our own small contribution to the development of sustainable mobility.