A30 Chiverton Cross Roundabout Improvement (completed February 2011)

Cornwall Council in partnership with the Highway Agency have delivered a high profile scheme on one of Cornwall’s busiest junctions. 

The A30 trunk road is a strategic transport corridor and of great significance to the economy of Cornwall.  It links the end of the M5 at Exeter, in Devon, to Cornwall as far west as Penzance.

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The Chiverton Cross junction, located 4 miles west of Truro, comprises a roundabout linking the A30 with the A390 primary route to Truro, the A3075 primary route to Newquay and the north coast, and the B3277 to St Agnes.  From the junction the A30 runs west as a dual carriageway serving the Camborne-Pool-Redruth area (4-9 miles) and on to Penzance and west Cornwall.  To the east of the junction the A30 comprises a single carriageway as far as the A39 junction at Carland Cross. 

The scheme was completed and open to traffic in February 2011 some four weeks earlier than the original programme.  The project was completed under the budget of £3.85 million despite the complex work involved in keeping traffic flowing. The programme and costs were subject to the tight deadlines and values agreed with the Government’s Community Infrastructure Fund managers – Cornwall Council had to ensure these were met to avoid missing out on this funding stream and then picking up the shortfall from alternative sources.

The scheme has been delivered with the cooperation of the Highways Agency, without whom this scheme would not have happened, the two authorities have worked have together extremely effectively to deliver the scheme to this very tight funding window.  Also, the low level of complaints received by the Highways Agency and Cornwall Council during this period was pleasing and an indicator of how well the project was being delivered particularly given the nature of the scheme.

During construction every effort was made to keep disruption to traffic to a minimum and to help this some of the works were carried out in the evenings and at night. 

The scheme was funded from the Government’s Community Infrastructure Fund, which was developed to support transport infrastructure costs in growth areas.  The scheme has been designed by Cornwall Council’s in-house design organisation and the Council has been working in partnership with the Highways Agency who manages the A30 trunk road.

 In February 2013 the day to day running of this section of the A30 Trunk road was handed back to the Highways Agency.  If any member of the public has any questions or issues relating to Chiverton Cross roundabout their enquiries should be made with the Highways Agency hail@highways.gsi.gov.uk.

  • To reduce queues particularly during peak periods. 
  • To improve journey time reliability. 
  • To prevent drivers seeking alternative routes on inappropriate local side roads.
  • To reduce accidents. 

The improvements increased the number of lanes entering onto the roundabout for the A30 trunk road, the B3277 St Agnes road and the A3075 Newquay road.  The A30 eastbound exit to Bodmin and the A390 exit to Truro was also improved. 

The improvements:

  • Meets all the scheme objectives; however it is an interim improvement. 
  • Avoids archaeological sites. 
  • Minimises the risk of adverse impact on the internationally designated World Heritage Site. 
  • Represents a route that is sympathetic to the surrounding landscape and topography. 
  • Allows successful integration of the local, county and trunk road networks. 

Now complete it has achieved:

  • A reduction in congestion and delays. 
  • Improvinements in journey time reliability. 
  • Additional capacity to cater for future economic and housing growth in the area.