The Coldra Roundabout at Junction 24 of the M4 is the main gateway into Newport from London and the Midlands. The busy junction made local access difficult, with limited provision for pedestrians and cyclists.

Traffic flows had exceeded maximum capacity leading to long queues and delays in the area. 

The aim of the project was to improve the capacity of the junction and the local environment. A key element of the scheme included the construction of a ‘Hamburger Arrangement’ providing a direct link through the central island from the A449 southbound to the M4 westbound The new layout dramatically reduced the traffic on the gyratory. A new pedestrian/cycle way was constructed through the central island linking existing pedestrian and cycle ways and enhancing the SUSTRANS cycle network.

As the Coldra roundabout is home to a number of protected animal and plant species, surveying and mitigation measures followed strict guidelines.

Environmental enhancements included soft landscaping, use of felled trees to create reptile habitats and use of excavated material in landscaping features. Surface water runoff is held in an underground storage facility prior to controlled discharge into the existing drainage.

To reserve a place contact: Felicity White on 029 2063 0561 
or felicity.white@ice.org.uk 

This meeting is arranged by ICE Wales Cymru.