High Integrity Systems Group
The purpose of the High-Integrity Systems Group (HISG) is to establish and share best practice in the area of software in high integrity railway applications. (This includes firmware, operating systems, applications, and application data.
The scope of the group’s considerations is software that is used to operate the railway where safety and/or reliability are important. It excludes systems that are used primarily for commercial purposes. Signalling systems, brake and traction control systems, route setting systems, and train crew and passenger information systems are within scope, but ticketing systems and off-line performance monitoring systems are not.
The rationale for the establishment of the group arose from discussion at an RSSB Board meeting in May 2011, in the context of a wrong side signalling failure at Milton Keynes on 29 December 2008. It was subsequently agreed that the Railway Industry Association (RIA) would host a cross-industry workshop to enable a focused discussion to take place regarding high integrity software in the GB rail sector. The outcomes from this workshop led to RSSB establishing this group.
As of March 2020, the group reports to the newly-formed Asset Integrity Group (AIG). A combined group programme of work is being developed and will be implemented by the end of 2020.
Message from the chair
The group’s membership is made up of the following industry categories:
- passenger train operators
- rolling stock owners and leasing companies
- infrastructure managers and owners
- suppliers and rolling stock manufacturers
- Office of Rail and Road (observer).