The Work Order requires the Consultant to deliver Phase 3 of National Highways' Winter Research & Development programme (April 2026 toMarch 2028), comprising four main tasks: (1) conducting laboratory, sterile site and on road trials to determine the longevity and optimal spread rates of Potassium Acetate deicer, validating previous research and generating evidence based recommendations for national guidance; (2) reviewing current hoar frost treatment practices, undertaking research and performance trials to identify effective treatment strategies and spread rates under varying severities, and producing updated guidance; (3) developing a standardised, robust winter treatment ...