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A30 Temple to
Higher Carblake
improvement scheme

Scheme Overview

The current single carriageway of the A30 between Temple and Higher Carblake is the only section of single carriageway between leaving Scotland and reaching Temple. This 4.5km section of road is being improved to dual carriageway standard for the entire length which will negate regular traffic congestion in the area.


Link to Cornwall Council video release 22.03.16

Work started in June 2015 and is due for completion in July 2017.

We are dualling the single carriageway on the A30 between Temple and Higher Carblake, just east of Bodmin. The length of road involved is 2.8 miles (4.5km). Three busy road junctions will be replaced by three overbridges; one bridge at either end at Cardinham and Temple junctions and one relatively centre at Preeze Cross/Four Winds. The dual carriageway is being constructed literally alongside the existing road and traffic management is a key element of the project.

Impact on Your Journey

Regular users of the road will know that there has always been considerable congestion on Fridays through to Mondays, Bank Holidays and of course during the summer holiday period for the past decade. However this should all change when the works are completed.

There is a strictly enforced 40 mph average speed restriction throughout the works as a result of the narrow lanes and for the safety of all road users. It may be interesting to note that the speed restriction should only add a few minutes to your total journey time.


Benefits of the scheme

The scheme will relieve congestion and improve journey times – it will also attract business growth and inward investment to Cornwall by improving links with the rest of England. The new dual carriageway will also be much safer than the single carriageway as a result of the three overbridges.

There will also be job opportunities for local individuals and businesses for the duration of the scheme.

Who are Kier?

We invest in, build, maintain and renew the places where people live, work and play. Kier is all around us… from engineering the tunnels and bridges that transform cities… to keeping the lights shining in our streets… to building award winning homes, schools and hospitals… to keeping our water, rail and highways running smoothly.

Our job is to keep our world working.

Our new ‘A30 Temple to Higher Carblake Newsletter is now available to view.  Please click on November Newsletter 2016 



A30 Junctions



For UPDATES please scroll down and click on ‘read article’ – click arrows eitherside of report to view previous updates.

Please note: In the event of an emergency within the site management area please call 07710 402 810




Construction Updates

  • 6th March 2017

    Kier Travel and Works Update – 6 March 2017

     A30 – Temporary Closure of Trethorne Lane from Monday 13th March until Monday 10th April 2017                                                                                                      

    Please be aware there will be changes within the contraflow system on the A30 in the area of the Pounds Conce dip affecting access to Trethorne Lane (junction 7. on website plan link on home page). All traffic will be diverted into the new westbound carriageway. Owing to the permanent construction of the eastbound carriageway and the side road there will be no access for traffic into or out of Trethorne Lane junction with the A30.

    From Monday 13th March 2017 access will no longer be available via the A30 for approximately one month unless notified of earlier completion. This will enable the remaining current eastbound carriageway on the A30 to be completed; it will also enable the new access lane from Preeze Cross overbridge to be tied into the current Trethorne Lane.

    Access for residents in the Trethorne area will be achieved using the Four Winds junction – Blisland Lane – right-turn at the Whitecross crossroad – right-turn for Waterloo – finally a right-turn prior to Blisland School for Trethorne. The return journey is the reverse of the above where access onto the A30 is available in either direction at Four Winds.

    Kier apologise for any inconvenience caused during these essential works. 

    If further clarification required then please Email: a30bodmin@kier.co.uk or tlephone the 24hr answerphone service on 07790 439 637


    Read article
  • 2nd March 2017

    Kier Travel and Works Update – 2 March 2017

    A30 – Temporary closure of Cardinham Junction (aka Cardinham Gap) with Airfield Road – Completed

    Please be advised that the current work affecting access to the Cardinham area via the ‘Cardinham Gap’ has been completed early and will be open to traffic again from this evening. This also includes all work that required the temporary closure of the ‘gap’ on Tuesday 7th March.

    Please note: Due to extra work now programmed Airfield Road junction with the A30 will need to be closed between 9.00am and 5.00pm on Monday 6th, Tuesday 7th and Wednesday 8th March. The closure is required for site safety to protect our workforce whilst carrying out works on the new traffic island.  

    Cardinham Gap will remain open at all times – this closure only affects access on Airfield Road (north end) junction with the A30.

    When the Airfield Road closure is in place the diversion will remain the same for A30 traffic via Lidcutt Road for the Cardinham area. Traffic requiring the A30 will be diverted to use Lidcutt Road.

    Kier apologise for any inconvenience caused during these works. If further details are required please contact Mick Martin – Kier Public Liaison Officer on 07790 560 809 or email michael.martin@kier.co.uk


    Read article
  • 28th February 2017

    Kier Travel and Works Update – 28 February 2017

    A30 – Temporary short term closure of Cardinham Junction (aka Cardinham Gap) with Airfield Road

    Please be advised that the current left-turn for westbound A30 traffic for access to the Cardinham area will be temporarily closed during Thursday 2nd and again on Tuesday 7th March 2017.

    On Thursday 2nd March the temporary closure should only last for approximately 1 hour during the day between 9.00am and 3.00pm; this will enable the A30 carriageway (currently not being used for through traffic) to be completely planed off at the Airfield Road junction.

    On Tuesday 7th March the temporary closure will last longer during the day between 9.00am and 3.00pm; this will enable the A30 carriageway (currently not being used for through traffic) to be completely resurfaced throughout the Airfield Road junction.

    The diversion available to drivers is to continue west on the A30 in the contraflow – exit A30 at the Bodmin off-ramp – left-turn Cooksland Road (Nissan Garage) – left-turn Priory Road (A38) – left-turn Carminow Roundabout (A38 – Plymouth) – left-turn Turfdown Road (Crematorium) – continue via Fletcher’s Bridge to Cardinham or Mount area.

    Please note: Access to the A30 from Lidcutt Road (for Bodmin) will not be affected at any time.

    Kier apologise for the inconvenience that may be caused during this short term essential work to complete the resurfacing of the junction of Airfield Road and the westbound A30 carriageway. Unfortunately it is not possible to give a definitive time for the exact closure due to the specific nature of the work involved with planing and resurfacing.


    Read article


We value your feedback.

“To assist local residents, Kier have opened a ‘Help Desk’ to discuss any clarification on the scheme. Please call our Help Desk number, leave a message, name and email address and we will endeavour to respond quickly. Alternatively, please contact us via email; we welcome all comments.”

Help Desk: 07779 439637

Email: a30bodmin@kier.co.uk