Question to the Department for Transport:

To ask Her Majesty’s Government, when assessing road investment schemes using WebTAG, what proportion of the economic benefits were attributed to savings of two minutes or less.

Road investment decisions are supported with a five-part business case. The economic case aims to provide a comprehensive overview of a proposal’s impacts. These include a wide range of social and environmental factors, as well as time savings and economic impacts. The proportion of time saving benefits which are attributed to average time savings ‎per trip of two minutes or less varies between projects, depending on the nature of the scheme, and is not centrally held.