PARLIAMENTARY WRITTEN QUESTION
(10 December 2024)

National Highways’ South Central Route Strategy recognises the current pressures and future needs of the A21 in Kent particularly around journey time reliability and safety. National Highways will consider the case and priority for further improvements to the route as part of its future investment planning.

Regarding hedgerow maintenance, National Highways regularly inspects the A21 to ensure safety and maintain vegetation. Hedge maintenance and clearance are carried out on a schedule to balance safety and environmental needs. For hedgerows, work is typically done outside the bird nesting season, from October to February. Shrubs are maintained every three years, and woodland is managed every seven years. Where responsibilities for maintenance falls to landowners, National Highways intends to raise awareness about vegetation clearance with residents living along the A21.

The A21 Safety Package is a series of schemes to improve safety along the route which includes among others junction improvements, changes to speed limits, improved signage and road markings, and improvements to road visibility. On the issue of visibility, where this was identified as a risk during the design stage, the interventions being delivered will address that. For example, work has been undertaken to improve visibility at Vinehall School, where visibility was identified as a factor to the conflicting movement at the exit/entrance of the school. National Highways undertook clearance works to improve the visibility splay, which was completed in the last financial year. In November 2024 National Highways undertook vegetation clearance at Riverhill lay-bay to help make the lay-bay more visible to the users.

Finally, as with all the safety measures, National Highways will carry out a post implementation analysis to evaluate the safety interventions undertaken on the A21. Post analysis normally includes a road safety audit which provides an effective, independent review of the road safety implications of the interventions for all road users. Evaluation usually happens 12-18 months after the intervention and the metrics measured will vary depending on the type of intervention.