Pwll-y-Pant roundabout highway improvement works
Stay Connected

You can now sign up for email alerts to be informed of the latest progress of the Pwll-y-Pant highways improvement works. We also offer subscriptions to other council services and news.

Google Maps and - live traffic information

Live traffic showing delays can be viewed using Google Maps to zoom into the area and switching on the ‘Traffic’ view.

You can view traffic information from Caerphilly and the Pwll-y-Pant Roundabout on is the most comprehensive source of up-to-date roadworks information in the UK.. Just click on the link and search for Caerphilly. is updated every 30 minutes therefore delivering real-time access to local roadworks information across nearly 100 local authorities (rising rapidly as more LAs sign up to the service) as well as motorways and trunk routes across England and Wales. is free to view - users are able to view precisely where and when roadworks are taking place on a map, who is responsible for them, and assess the likely impact on journey times. You can even sign up to receive email alerts about future planned works in your area.


Progress updates

Works completed w/c 4/12/17

Traffic and pedestrian management

  • No changes


  • Minor work on central island

Trecenydd arm

  • Earthworks to construct new carriageway foundation – practically completed
  • Footpath construction commences
  • Drainage continues – issues with underground services caused some headaches but progressing well
  • Splitter island removed. Other work commenced

Pontygwindy Road

  • Earthworks to construct new carriageway foundation commenced
  • Drainage continues (ducting not yet commenced)
  • High Voltage cable diversion commences (preliminary work completed)
  • Many trial holes excavated as a lot of services in this area. Various issues being resolved 

Bedwas arm

  • Retaining wall A blockwork commenced
  • Retaining wall B blockwork continues (some design changes being implemented)
  • Backfill behind retaining wall B
  • Earthworks remove spoil continuesRoad foundation excavation continues

Works planned (w/c 11/12/17):

Traffic and pedestrian management

  • No changes


  • No work planned

Trecenydd arm

  • Footpath construction continues
  • Drainage continues
  • Ducting commences
  • Splitter island work continues. Chambers, ducts etc

Pontygwindy Road

  • Earthworks to construct new carriageway foundation commenced
  • Drainage continues – should be completed
  • High Voltage cable diversion work continues

Bedwas arm

  • Retaining wall A blockwork continues
  • Retaining wall B blockwork continues
  • Backfill behind retaining wall B
  • Earthworks remove spoil continues
  • Road foundation excavation continues
  • South side – commence topsoil strip and trial holes

Proposed Layout

The map of the proposed works is available to view below: -

Frequently asked questions

Are there any changes planned to help people and businesses in the run up to Christmas?

The council has listened to the concerns of motorists and local business community and has made changes to the Contract to allow two lanes on the roundabout for a period, from 30th November to 7th January.

Two lanes will be available on the A469 Llanbradach bypass, meaning that traffic will not be required to merge into one lane when travelling southbound on the bypass. Two lanes will also be available around the roundabout, and on the entrances from the other roads, which will help improve capacity and traffic flow at this key strategic junction.

Is driver behaviour having an impact on the flow of traffic through the scheme?

Driver behaviour plays a significant part in the efficient flow of traffic at any roadworks -  go to the RAC website for further advice

Drivers - help keep Caerphilly moving:

  • Use both lanes to queue on the approach from Llanbradach
  • Merge in turn at the point where the two lanes converge
  • Use indicators correctly on the roundabout. Take care not to indicate left too soon; this can cause confusion particularly to drivers from Heol Pwllypant and Corbetts Lane
  • Drive slowly on the roundabout itself, allowing time for queueing vehicles to pull out safely ahead of you

These small changes can have a big impact on overall queueing times.

What benefits will the scheme deliver?

Traffic modelling shows that if no improvements were made to the roundabout, queue lengths will continue to increase; journey times, particularly from Ystrad Mynach, but from all directions both local and through traffic, will become intolerable.

The completed roundabout improvements will deliver: -

  • Overall reduction in current journey times
  • Reduction in queue lengths on the approaches to the roundabout
  • Increased capacity to accommodate future traffic growth
  • A new link at the foot of the existing over bridge, which means that pedestrians will no longer need to walk through the Pontygwindy Industrial Estate
  • A new controlled pedestrian crossing on the A468/9
  • Safer entry to the roundabout from Corbetts Lane and Heol Pwllypant
  • Futureproof - no further maintenance works should be necessary for some time, and the junction will be ready for any further dualling of Trecenydd and Bedwas arms.

Who should I contact if I have a problem or for information during the works?

Note that the most effective way for CCBC to provide considered responses is to use the link below and complete the details of your issue or query, including your contact details. Your issue will be formally logged and you will receive a response via email.

Highway Services can be reached on 01443 815588.

When I drive throught the works, I sometimes see workers standing around, or sitting in excavators not working. Can’t these people be used on other jobs and get the roadworks completed faster?

Everyone has a vested interest in finishing the job as quickly as possible; none more so than CCBC and the Contractor. The Council is confident in the choice of Contractor and in the way the site is run.

It may appear when driving past that in that moment there isn’t enough happening to progress the works but if the contractor had a method of working that allowed inefficient working, or used the wrong equipment, or had lazy operatives, his business would fairly swiftly close, and certainly would not be able to meet the quality requirements to be able to tender for any works as significant and complex as this scheme.

Pwllypant is a linear construction project ie jobs have to be completed in sequence, and the site itself is subject to many constraints which affect the way the project can be built, including the existing highway and working with live traffic.

The constraints of the site largely determine the sequence and timing of the work. It is this construction logic and sequencing which dictates what work is done, and when. Daily allocation of resources of plant and labour are committed to complete the planned work efficiently. There are always changes and these can be significant based on what is uncovered in the ground.

There is an ongoing, hourly, daily, weekly, monthly management process to keep the Contract on programme.

The team on site are all hard working men and women working in an environment that comes with some risk by the very nature of the work and the negative comments do impact on morale on site. Most of the workforce  are local guys who are proud of the work they do, and of this job.

The support of local people is just as important to the success of this project as the team on site.

When will the works start and finish?

  • The planned construction period is 12 months, but opportunities to reduce this will be reviewed and the period shortened if at all possible
  • Start on site Monday, 9th Oct 2017
  • Current planned completion date, 8th October 2018
  • Planned phases of work are as follows:
    • Roundabout Gyratory - October to December 2017
    • Trecenydd Arm - October 2017 to March 2018
    • Pontygwindy Road northbound - October 2017 to March 2018
    • Pontygwindy Road southbound - October to December 2017
    • Heol Pwll-y-Pant - January 2018 to April 2018
    • A468 Bedwas Arm - October 2017 to July 2018
    • South side of Corbetts Lane - October 2017 to February 2018 in three phases
    • A469 Llanbradach Arm - December 2017 to June 2018
    • Surfacing all roads - June 2018 to September 2018

How will the proposed works affect travel?

  • There will be a need for traffic management throughout the construction works; delays are likely to your current journey times
  • There will be road closure and diversions during the surfacing work near the end of the construction period in 2018. Dates and diversion routes will be advertised nearer the time and diversions will be signed
  • Apart from the changes made in the run up to Christmas, throughout most of the works, all approaches and exits on the roundabout will be single lane, including the roundabout itself. As construction work progresses, two-lane exits will be available which will help improve traffic flow and reduce delays

Will the Traffic Management be in place all the time?

  • The nature of the work requires excavation of the existing carriageway so the traffic management will be in place 24/7 throughout the construction period. As soon as it is safe to do so, the traffic management will be removed and the carriageway reopened. Inspections will be carried out outside working hours and there will be a contact number advertised to report any issues.

Can’t the cones be moved at peak times?

There are now excavations in the carriageway and these areas are not suitable for traffic. The cones are set to give a safety zone between traffic and excavated areas.

Why is there no work going on inside some of the cones? Can’t these lanes be opened?

The cones installed on the approach arms are not set up to allow work to take place, they are there to close the approaches down to a single lane prior to vehicles arriving at the roundabout. There is only one lane available on the roundabout and at the exits so the approaches also have to be single lane to avoid conflict between vehicles trying to move into the same space. Note that as well as providing safety for traveling public and workers, this arrangement is a legal requirement (refer to Traffic Signs Manual, Chapter 8 if you need further details)..

The reduction of the carriageways to a single lane will cause severe delays. Isn’t there a better way?

  • It is not possible to construct a scheme of this magnitude without disruption. The strategy has been to target the greatest area of disruption early in the works and it is anticipated that delays will reduce over time as phases of work come online.

What times will work be happening?

  • The Normal working hours will be Monday to Friday between 8am and 6pm and Saturday between 8am and 4pm at the latest.

Will there be any overnight working?

The Contractor is continually looking at ways to reduce programme length and mitigate delays; night working is one of these options although there is very limited number of shifts currently planned due to the disruption this would cause to residents. 

Night working  is being considered as an option, but only as an exception, when site operations will have significant impacts on the travelling public over and above what may be expected during normal day to day operations .e.g. surfacing operations with road closures or major service diversions at road crossings etc.

Note  that even if the site was constructed entirely at night, the Traffic management would still be in place during the day, due to the open excavations, so would not provide any mitigation to delays.

​Will access to my property be restricted at any time?

  • Access to properties will be maintained at all times.

Will there be traffic lights used?

  • The sections where the new works join the existing carriageway on the Trecenydd and Bedwas Arms will be carried out under traffic lights. Every effort will be made to minimise the time that the lights are used but they will be in place 24/7 until the carriageway section is suitable for traffic again.

​Will the existing pedestrian crossing on Llanbradach arm be closed during the works?

  • Whenever possible there will be a temporary controlled signal crossing available, although there will be times when the work has closed the footpath, that there will not be a crossing. All existing pedestrian facilities will remain open at all times until an adequate safe alternative has been provided.  This alternative will be approved by the Council.

Will bus stops/routes be affected by the works?

  • The Contractor is under a contractual requirement to liaise with the various bus companies that operate within the scheme vicinity and provide them with notice of any forthcoming road closures or any restrictions that will affect bus stops or bus routes.

Why were residents not pre-warned via signage in advance?

  • There was a short mobilisation period for this scheme but every effort was made to communicate what was happening, and why.
  • Warning signs were erected prior to the start of works.
  • In addition to this the scheme has been widely advertised, publicity to date has included:
    • letter drops to over 600 residents who live in the immediate vicinity to the scheme
    • notification to YYF hospital
    • a dedicated Pwllypant website,
    • road works alerts,
    • Use of social medial such as linked in, Facebook Twitter, etc., local newspapers and use of adjacent local authority websites.
    • Drop-in sessions, which were advertised on the Pwllypant website, Twitter and Facebook, have also been held..

How will emergency services get through the gridlock?

  • Emergency vehicles can overtake queues using their ‘blues and twos’, as they would in any situation where there is standing traffic. There is an emergency vehicle plan for the site and they would be allowed into the works area if necessary – there should always be routes available.

How can we maintain access to and from the Hospital?

  • Sufficient time should be given to allow for any delays. In an emergency, ambulances would be able to get through.  YYF have also been informed of the works and traffic management meetings take place with emergency service providers.

Does the finished scheme make allowance for cyclists, and how does it align with the published Active Travel Plan?

Does the finished scheme have pedestrian access along the Bedwas arm?

There are no allowances for specific cycle routes in the scheme due to both site constraints and how the scheme is funded, however both pedestrian crossings associated with the scheme have been future proofed to accommodate connection to a future cycling network.

There is no footpath on the Bedwas arm. For the wider strategy for pedestrians and cyclists, Caerphilly’s Active Travel Integrated Network Map has been developed and has been approved.

The associated connecting routes for segregated walking/cycling movements surrounding Pwllypant will be included in the submitted map. Note that the links included show preferred routes and all will require a feasibility study and funding commitment to progress. The routes are likely to be shared space due to width constraints.

The following information may be useful:

I am losing trade as a result of the delays/ works – am I entitled to compensation?

  • The usual remedy where a business believes it is suffering from trade disruption caused by building / engineering works in the surrounding area is to seek a reduction in the rateable value of the premises by completing an appeal form issued by the Valuation Office Agency (part of the Inland Revenue).  The Valuation Office Agency is responsible for determining the rateable value of all business premises.  The Authority would encourage all businesses to contact the Valuation Office Agency immediately and submit an appeal against their rateable value (photographs to evidence the extent of the work and its proximity to your premises should be submitted).  Their telephone number is 03000 505 505.

I am concerned that traffic is diverting via Pandy Lane to advoid the queues at the roundabout.

CCBC have received a number of concerns, that motorists are using Pandy Lane as an alternative route to avoid the Pwll-y-pant roundabout improvement scheme.  CCBC  will shortly be erecting signs on the entrances to Pandy Lane stating “Not suitable for HGV’S”, “Local traffic only” and “All through traffic use A469”, it is anticipated that this will reduce the number of motorists using the lane as a diversion route.

Timeline of key milestones 

  • 7th June 2017 - Cabinet approved proposals for the Pwll-y-Pant roundabout improvement scheme as a priority highway scheme on 7th June 2017
  • 26th January 2015 to 13th March 2015 - Consultation survey results |  Summary of results (PDF) |  Questionnaire results (PDF)
  • 29th January 2015 to 5th March 2015 - Three Public Information days held to enable residents, businesses and other interested groups to view details of the planned improvements

Further Information

For concerns about the scheme itself, for information on the design, to raise concerns about impact on local business, please select the link below