The existing traffic models have delivered significant efficiency savings for National Highways by accelerating traffic modelling and economic appraisal across Project Control Framework PCF schemes and have been fundamental in underpinning the RIS2 and RIS3 business cases. However, the current models are based on 2019 travel patterns and, despite producing forecasts to 2061, no longer accurately reflect post COVID changes in travel behaviour. This project is therefore critical to update the base