Project Overview

This project involved the demolition of an existing reinforced concrete footbridge and replacement with a new steel footbridge spanning the M4 dual two lane motorway plus hard shoulders (approx. 36 metres), approach ramps and associated guardrail, and new structure lighting. The new structure was constructed alongside the existing to maintain access across the motorway for the general public while the new structure was under construction. 

The works were constructed within extensive traffic management on the M4 motorway between Junction 45 and 46. All traffic management proposals were passed through the local authority, South Wales Trunk Road Agency and motorway traffic police for approvals prior to being implemented, including both lane closures and proposed diversion routes. 

To minimize disruption to the travelling public, assembly of the new structure and demolition of the existing reinforced concrete structure were carried out under night closures of the M4 motorway. Appropriate working methods, protection measures and contingency measures were employed to ensure the works were completed safety, with assurance the M4 motorway would be reopened the following morning. 

To carry out the works Dawnus worked closely with both the local and motorway police authorities to implement extensive traffic management and deliver the structure to site, and advised local residents by letter drop. Dawnus also worked with the local residents explaining the programme and nature of the works, and advised of the potentially noisy activities during the night time closures of the M4 motorway. We also worked closely with the Neath Port Talbot Council with timings for all motorway closures advertised on their website for public information purposes.

Project Gallery


Neath Port Talbot County Borough Council



Project Value


Contract Period

20 weeks