The network performance model (NPM) was developed for Highways England by Risk Solutions. It is a software model that supports analysis of traffic performance on the strategic road network (SRN). It is used by the HA national intelligence unit (NIU) to support their analysis of network performance. Highways England uses this type of analysis to characterise the past performance of its roads, as well as to project scenarios about its expected future performance given various road investment strategies.  more...