WHENEVER a signalling conference is staged in Europe and ERTMS is on the agenda, delegates are guaranteed a lively, or at times, heated exchange of views. Global Transport Forum’s signalling and train control event in Zürich was no exception, and I feel confident that passions will run high during this month’s ERTMS World Congress being staged by the International Union of Railways (UIC) in Stockholm. The same is true of Positive Train Control (PTC) in the United States.