SIGNAL+DRAHT | Issue 04/2008

Lifecycle-based functional interlocking specification

April 2008 | Michiel Lim

ProRail is the railway network manager in the Netherlands. ProRail plans to replace relay based signalling systems by electronic interlocking systems that are to be developed by suppliers. This article describes how to write a lifecycle-based functional specification for an interlocking system and how this would relate to a requirements document that can be used to purchase an interlocking system.