Newport St Mary's Strategic Junction Improvements

Work on a major scheme to reduce traffic congestion and improve access for pedestrians and cyclists at one of the Islandís busiest junctions is now underway and will last until mid-December 2020.

Construction of the Isle of Wight Council scheme will transform the approaches to, and access across, St Mary’s Roundabout in Newport. 

The scheme, which is part of the wider Newport Strategic Junction Improvements and agreed by the council in September 2018, is designed to reduce congestion now as well as ‘future-proofing’ the junction - given expected growth in traffic movement associated with regeneration projects in the Newport area.  

It is the largest of a package of schemes designed to improve traffic flows through Newport, which have been financed largely by a Government grant of £9.6 million, supplementing development contributions.

Other schemes within the overall Newport Strategic Junction Improvements, such as the new arrangements at St George’s Way and Shide, have already been implemented, while others which will follow in the next three-five years - including the link between Coppins Bridge and the Matalan roundabout, which has also been given the go ahead - are still being planned. 

Collectively these schemes, once completed, will transform the flow of traffic in and around Newport and accommodate the projected volumes of traffic expected in the emerging local plan.

What does the scheme include?

The St Mary’s junction scheme includes benefits for vehicular, pedestrian, cyclist and local bus traffic with new widened shared-use cycle/pedestrian facilities and the removal of the current roundabout which will be replaced with two, linked traffic light-controlled junctions to improve traffic flow.

There will also be an additional lane introduced at the B&Q roundabout to ease congestion on the approach to and from the new junction. 

It will also include widening of the Northbound carriageway of Medina Way to accommodate two right hand turn lanes to facilitate traffic turning onto the industrial estate.  The road from Cowes into Newport will also be widened on the southbound side to ease congestion on the approach to the junction.

Works are also being implemented on Forest Road at the same time as SSE carry out planned high voltage cable upgrade works to help minimise future disruption for residents and the travelling public on this route.

The council is however advising road users that the work will cause disruption during some phases, particularly until motorists become accustomed to temporary traffic arrangements during construction.


The project, which began on September 30 and will be completed by mid- December 2020, is the largest of its kind on the Island for many years.

Construction will take place over a number of phases.  The initial phase began on 30th September 2019 and will run until 20 December 2019.  Please refer to the key documents below for a summary of the work that will be undertaken in this first phase.

The works will pause over the Christmas and New Year holiday in 2019 and during the IW Festival period next June. Work will take place during the day and at night when appropriate and elements of the scheme will be implemented concurrently. 

There are a variety of factors including inclement weather, emergency works and scheme extensions that can affect the timing of works.  Due to the size and nature of this scheme, the works programme is subject to change, but programme updates will be issued as each phase progresses.

Likely impact:

The work to improve the junction will be carried out by Island Roads and during construction there will be various temporary traffic arrangements to enable work to be undertaken as quickly and safely as possible.  Traffic lanes will be reduced temporarily, and contraflows introduced as well as short-term speed reductions.  Road users will inevitably experience delays and should allow additional time for their journeys.  It is worth also considering, where possible, changing the time in which you travel to avoid rush hour or potentially look at alternative modes of transport or routes.

Recognising the impact on adjacent areas, double yellow lines will also be introduced to Manners View and Riverway for at least the duration of the scheme, to enable better access to the industrial estate.

Preparatory works, including the set-up of a site compound/works depot, started on Monday (30 September).

At this point, most of the approaches to the roundabout will be unaffected with all existing lanes open to traffic north and southbound between Cowes and Newport on either side of the roundabout.

The major change during this period until Monday 4 November will be Forest Road which will become one-way eastbound into Newport from its junction with Argyle Road.

This is to accommodate works by BT, WightFibre and SSE high voltage cabling works ahead of the road widening work at this junction.

A signed diversion will be in place for traffic heading towards Gunville and West Wight via Medina Way, St Georges Way, Trafalgar Road, Carisbrooke Road and Gunville Road.

Work has also taken place to introduce an additional lane to the B&Q mini roundabout.  These works were carried out over five weeks including two weeks of overnight work to limit the impact on motorists.

Latest update:

In the next phase of work which starts on Monday, 4 November and runs through to 20 December, Forest Road will revert to two-way traffic, while all other approaches to the St Mary’s roundabout will be reduced by one lane while works to remove the central reservations and roundabout take place.

See traffic map showing arrangements here.

Information and updates:

Residents and stakeholders have received letters about the scheme and its implications and will continue to do so at relevant points throughout the scheme.  Maps showing the traffic arrangements for the first phase of works up to December have also been advertised and are included in the key documents below.

Static and electronic signs are out on site advising people of the works and an extensive letter drop, bus information screens, social media, information display boards, stakeholder briefings, website updates, press adverts and information have also been issued. Regular scheme updates and information will be included on this page as the scheme progresses and will also be relayed via Twitter. 

If you have any questions about the scheme that are not covered by the frequently asked questions document below, or would like to contact us - you can email or telephone 01983 822440.  You can also use our Report it online facility here.

Key documents 

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