Another full closure of part of the A30 in Cornwall has now begun – and there has been change in the diversion route for HGVs.

The road is now shut to all traffic between Boxheater and Scorrier, as of 8pm last night (Friday, March 8) and will continue to remain closed until 6am on Monday (March 11)

This is to allow National Highways to carry out work on the Chiverton flyover and other infrastructure along the route, as part of the larger dualling of the A30 between Chiverton Cross and Carland Cross.

However, there has been a slight change to the diversion route for high sided vehicles and HGV traffic.

This will now need to divert via Chacewater in order to avoid the low bridge at Scorrier, which at 4.7m / 15ft 3in high will not accommodate taller vehicles.

National Highways said this temporary change to the diversion route has been agreed with Cornwall Council as their highways department is starting work to repair a collapsed mineshaft on the A393 Sandy Lane, which is typically used for these diversions.

All other types of vehicles can continue to use the standard diversion route, via the B3285, A3075 and B3277.

Local access north and south at the new Chiverton interchange and via the B3284 at Chybucca will be maintained throughout these closures.

Further closures coming up

  • Overnight - March 18 to 22
  • Weekend - March 22 to 25
  • Overnight - April 8 to 12
  • Weekend - April 12 to 15
  • Overnight - April 22 to 26
  • Weekend - April 26 to 29

These dates are subject to change, the location of these closures will be confirmed nearer the time.

Last month National Highways revealed that the opening of the new dualled stretch, which had been expected to open at the end of March, was now forecast to open for traffic in in June.

However, it said the road should still be open in time for the summer school holidays.

Construction had been delayed initially by the pandemic, before starting in 2021.

National Highways said since the scheme received its Development Consent Order in 2020, the programme of work had also faced a number of “weather challenges” – including 14 Met Office classified storms between January 2021 and August 2023.

Since last August alone there have been an unprecedented total of ten storms affecting Cornwall, which had pushed the work back.