Cornwall's motorists will have 18 road closures to avoid nearby on the National Highways network this week.

And two of them are expected to cause moderate delays – with drivers facing waits of between 10 minutes and half an hour.

The latest expected works list, with notes from National Highways, shows that two closures already in place are expected to carry on this week:

• A30, from midnight, September 1 2020 to midnight, December 1 2023, slight delays (under 10 minutes): A30 Carland Cross to Chiverton Cross improvement scheme.

• A30, from 8pm June 30 2021 to 6am December 1 2023, slight delays (under 10 minutes): A30 Zelah narrow lanes and 50 mph speed limit for Chiverton to Carland improvement scheme.

And a further 16 closures will begin over the next seven days:

• A30, from 9.30am June 6 to 4pm June 7, slight delays (under 10 minutes): A30 both directions Highgate exit slip lane closures for Cornwall Council works.

• A30, from 7pm June 7 to 6am June 8, slight delays (under 10 minutes): A30 eastbound, Kennards House to Trebursye closed for survey works. Diversion via minor road.

• A38, from midnight, to 2am on June 8, slight delays (under 10 minutes): A38 Two Waters Foot traffic signals and convoy working for vehicle recovery.

• A30, from 7am to 5pm on June 8, slight delays (under 10 minutes): A30 eastbound, Temple to Bolventor - Lane closure for barrier/Fence Safety Repairs.

• A30, from 7pm June 8 to 6am June 9, slight delays (under 10 minutes): A30 eastbound, Kennards House to Trebursye convoy working for surveys.

• A38, from 7pm June 9 to 6am June 11, slight delays (under 10 minutes): A38 westbound, Menheniot lane closure for surveys. , No access to/from westbound, carriageway to Lower Clicker Road. Diversion via Island Shop junction, Liskeard or Trerulefoot.

• A38, from 7pm June 9 to 6am June 11, slight delays (under 10 minutes): A38 eastbound, Menheniot convoy working for surveys.

• A30, from 8pm June 10 to 6am June 14, slight delays (under 10 minutes): A30 westbound, Colliford Lake to Temple - Convoy Working for White Lining/Road Markings.

• A38, from 8pm June 13 to 5am June 18, slight delays (under 10 minutes): A38 Both Directions Trerulefoot to Twelvewoods Lane closure for barrier Repairs.

• A30, from 7am June 14 to 5pm June 15, slight delays (under 10 minutes): A30 eastbound, Temple to Bolventor - Lane closure for barrier/Fence Safety Repairs.

• A30, from 10am June 14 to 6pm June 16, slight delays (under 10 minutes): A30 eastbound, Four Winds lane closure for Instalcom works.

• A30, from 8pm June 14 to 6am June 15, moderate delays (10-30 minutes): A30 westbound, Callywith to Victoria closed, including Carminow and Innis Down entry slip roads. For white lining / road markings. Diversion via A389 and Old Coach Road.

• A30, from 8pm June 15 to 6am June 18, moderate delays (10-30 minutes): A30 westbound, Callywith to Innis Down closed, including Carminow entry slip. For white lining / road markings. Diversion via A389 and Old Coach Road to re-join at Victoria.

• A30, from midnight, to 2am on June 17, slight delays (under 10 minutes): A30 Chiverton Cross traffic signals for Chiverton to Carland improvement scheme.

• A30, from 8pm June 20 to 6am June 25, slight delays (under 10 minutes): A30 between Chiverton Cross and Carland Cross traffic signals for Chiverton to Carland improvement scheme.

• A30, from 8pm June 20 to 6am June 23, slight delays (under 10 minutes): A30 eastbound and westbound, Chiverton Cross Roundabout - Lane closure Switching for White Lining/Road Marking works.

National Highways is responsible for maintaining motorways and major A-roads, so closures of smaller roads will not be included in their schedule.