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A30/Temple - Higher Carblake Dualling

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Temple - Higher Carblake Dualling
Location Map ( geo)
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From:  Temple
To:  Higher Carblake
Highway Authority
National Highways
Scheme Type
Upgrade (Single to Dual-Carriageway)
Construction Start Date
2014 to 2015
Opening Date
14 July 2017
£56 million
On road(s)

The Temple to Higher Carblake Dualling is designed to bring this notorious section of road up to standard. It was the only section of the A30 single carriageway between the M5 and Carland Cross Roundabout with the A39 north of Truro. The upgrade was online with grade separated junctions at either end. It was a joint project between Highways England and Cornwall Council to upgrade the road sooner than would be possible if the road was left to government and as a result the costs are split roughly 50/50 between the government and Cornwall Council and the companies backing it.


The new dual carriageway starts about half a mile west before the dual carriageway ends. The road immediately has a grade separated junction with a couple of local roads and this will also allow access to the service stations on the Eastbound side. The road continues over the old alignment past the petrol stations, with some side roads to allow access to local homes. Soon after there is another junction for local roads and Blisland. The road now has a relatively empty section for a mile or so except a junction on the Westbound side for Temple fisheries before meeting it's final junction. This gives access to the village of Temple. The road now meets the older dualled route to the east and the improvements finish here.


The road has remained much the same for years, with only recent improvements to try and make the road safer. Plans have been around for ages to turn this road into dual carriageway, and in 2005 plans were ready to be implemented. The scheme would have cost around £80 million and it would have included larger junctions and some of the Bodmin Bypass to the West. The new plan shortens the improvements by around a mile and will cost around £20 million less by making the junctions smaller and by running on the same land as the current road. The road currently has to deal with 20,000 cars a day, but it gets nearer 27,000+ during the peak of the Summer Holidays (with some sources claiming more than 30000); well over twice it's theoretical capacity!


Construction started on the scheme on the 10 June 2015 and was open to traffic on 14 July 2017.


5th February 2015

Permission was finally given from the government for this scheme to go ahead, one day before it was due. Kier have been announced as the contractors and work short start this spring.

Press Release

18th March 2015

Construction is delayed until June for an unspecified reason.

News Report

23rd March 2015

The official start to the project began today with the grass cutting ceremony. It was attended by Patrick McLoughlin, Cornwall Council and LEP representative and residents part of the 'Dual the A30' action group.

News Report

10th June 2015

Works have started on the £56m scheme today, including temporary speed limits and banned right turns. Local newspapers are predicting 'traffic chaos' for local residents.

Local News story

26th June 2015

Kier Group have created a website for the scheme. It contains details of the works including overnight closures and project updates.

Kier Website

25th Sept 2015

For those who haven't seen it already, there is a full list of the construction of individual sections of the road. This includes junction closures, bridge construction and carriageway building. All details are available here. There are also new photos of the scheme and they are available here. Both links take you to the Kier website.

18th Jan 2017

The contractors, Kier, announce a completion date for the dualling of this section, which includes the group removing all equipment and signage, by the 13th July 2017. Click here.

11th July 2017

Drivers reporting that the A30 Eastbound has been opened as a dual-carriageway, thus subject to the more-than-less 40 MPH speed limit in place and the formal opening ceremony on Friday. Overnight Closures between 7pm and 6am are also occurring this week. Click here.

14th July 2017

The section fully opened at 6am with no speed restrictions (NSL 70 mph excepted). The only remaining work required will be the opening of the Cardinham Bridge, scheduled for the week commencing 17th July and Temple Bridge scheduled for opening by the end of July. Ancillary works including landscaping will, however, continue throughout this time and into the Autumn. The road has now been running clear in this section.

Click here.

Click here.


Cornwall Council

Scheme Website

Devon County Council

Temple - Higher Carblake 2005 Route Plan (Page 6)

National Highways

Scheme Description

A30/Temple - Higher Carblake Dualling
 • Redruth  • Bodmin  • Newquay  • Fosse Way  • Penzance  • Hounslow  • Launceston  • Okehampton  • Honiton  • Exeter  • Yeovil  • Salisbury  • Basingstoke  • Staines  • London  • High Bridge (Dorset)  • Camberley  • A30/Named Junctions  • The Bull Dog  • Horsey Roundabout  • Newtown Roundabout  • Kennards House Junction  • Bullington Cross  • Popham Interchange  • Dummer Interchange  • Sowton Interchange  • Runnymede Interchange  • Black Dam Roundabout  • Henlys Roundabout  • Clockhouse Roundabout  • Crooked Billet  • Hatton Cross  • Egham Hill Roundabout  • Hackwood Road Roundabout  • Winchester Road Roundabout  • Brighton Hill Roundabout  • Kempshott Roundabout  • Hatch Warren Roundabout  • St Marks Roundabout  • Royal Chase Roundabout  • Ivy Cross Roundabout  • Bellmans Cross  • Southay Cross  • Turks Head Junction  • Iron Bridge Junction  • Daisymount Junction  • Pound Corner  • Carminow Cross  • Victoria Interchange  • Highgate Hill Roundabout  • Carland Cross  • Chiverton Cross  • Branwell Lane  • Mount Misery  • Quicksilver Roundabout  • Devonshire House  • Loggans Moor  • Chy-An-Mor  • Alphington Junction  • Whiddon Down Junction  • Pennygillam Junction  • Innis Downs Junction  • Pearce's Hill  • Yarcombe Bridge  • Runnymede Viaducts  • Palmersbridge  • Haselbury Bridge  • Easthams Bridge  • Stockbridge  • Sticklepath Bypass Bridge  • Basingstoke services  • Heathrow Airport  • Terminal 4 Roundabout  • Cornwall Services  • Pattesons Cross Junction  • Langford Junction  • Fingle Glen Junction  • Woodleigh Junction  • Tongue End Junction  • Meldon Junction  • Sourton Cross  • Stowford Cross Junction  • Liftondown Junction  • Tavistock Road Junction  • Trebursye Junction  • Callywith Junction  • Bolventor Junction  • Fraddon Junction  • Summercourt Junction  • Mitchell Junction  • Scorrier Junction  • Avers Junction  • Tolvaddon Junction  • Treswithian Junction  • St Erth Roundabout  • A30/Major Improvements  • A30/History - M5 to Okehampton  • A30/History - A303 to Exeter  • Two Bridges Junction  • Plusha Junction  • Fivelanes Junction  • Cannaframe Junction  • Preeze Cross Junction  • Boxheater Junction  • Chybucca Junction  • Heamoor Roundabout  • Chyandour Roundabout  • Dunheved Bridge  • A30/Hounslow - Bagshot  • A30/Penzance - Lands End  • A30/Redruth - Penzance  • A30/Bodmin - Redruth  • A30/Launceston - Bodmin  • A30/Okehampton - Launceston  • A30/Exeter - Okehampton  • A30/Upottery - Exeter  • A30/Yeovil - Upottery  • A30/Shaftesbury - Yeovil  • A30/Wilton - Shaftesbury  • A30/Bullington Cross - Salisbury  • A30/Popham - Sutton Scotney  • A30/Bagshot - Popham  • T8 (Britain)  • E1 (Old System)  • Cheneys Farm Interchange  • A30/route  • A30/Salisbury - Wilton  • A30/Bodmin - Indian Queens Dualling  • A30/Carland Cross - Chiverton Cross Dualling  • Wilton Roundabout (Wiltshire)  • Cardinham Downs Junction  • Temple Tor Junction  • Hayle  • A30/History - Connecting Cornwall  • A30/St Erth - Newtown Improvement  • T40 (Britain)  • T13 (Britain)  • A30  • Lopcombe Corner  • West Devon Drive  • Bunfield Hollow Roundabout  • Hospital Roundabout (Yeovil)  • Blackhorse Interchange  • Country House Interchange  • A30/history  • Foundry Square  • Land's End


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