S30069 Signal Setting Rules Safety Risk Assessment

2026-11-03

National Highways Connecting the Country vision is that the strategic road network (SRN)is part of a seamlessly integrated transport system that meets our customers' needs byconnecting the country safely and reliably, delivering economic prosperity, social value,and a thriving economy. It brings together our existing strategies including Routestrategies, Net zero highways, Digital roads and Customer service.Providing consistent signalling to customers is imperative to ensure customer service anddeliver safety. This project will seek to provide enhanced customer service whilstmaintaining safety risk as low as reasonably practicable. This is a vital part of the set ofoptions to resolve the anomaly with HADECS and MIDAS systems.The scope is to investigate whether the minimum off time of speed signals on the strategicroad network could be altered. The SRA will consider the possible new values that couldbe considered safe and preferably provide a "safe operating range" that the varioussystems can operate to (or can be reconfigured to operate to). The assessment will needto consider if there is a universal figure for all types of speed signal or if it varies dependenton the algorithm or the purpose of the speed limit displayed.

United Kingdom (UK)

2026-03-12