Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment his Department has made of the level of carbon dioxide emissions generated per lane for each mile of road expansion from road (a) construction and (b) widening schemes (i) during construction and (ii) over the anticipated lifetime of such schemes; and if he will make a statement.

All strategic road schemes promoted by the Department go through detailed analysis as set out in its Transport Analysis Guidance (TAG). Standard methods in TAG estimate the carbon impacts of road transport over the 60-year appraisal period. Embedded carbon from construction and the carbon impacts of maintenance and operation activities are captured in the scheme costs as the market prices faced by suppliers in emissions trading sectors include the cost of carbon.