Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment her Department has made of the potential impact of motorway lighting removal on the M4 between junctions 8 and 12 on road safety; and if she will publish Personal Injury Collision data for that area (a) since lighting was removed and (b) for the five years prior to removal.

National Highways has a thorough, consistent and documented approach to the management of construction schemes. National Highways assessed the removal of lighting on the M4 between junctions 8 and 12 using TA49/07, which was the assessment tool before TA 501 was published in March 2020. National Highways has published the M4 J3-J8/9 and J10-J12 Road Safety Lighting Review, which included a summary of the personal injury collision data for the 5 years prior to the removal of lighting. Road casualty statistics and the underlying data are published annually by the Department for Transport.