Drivers in and around Cornwall will have 13 National Highways road closures to watch out for this week.

But motorists will be able to take some solace in the fact that all of them are only expected to cause slight delays, of under 10 minutes.

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

• A38, from 7pm July 11 to 6am July 30, slight delays (under 10 minutes): A38 eastbound, Lower Clicker to Trerulefoot convoy and lane closures for carriageway resurfacing with central reservation gaps closed. Traffic wanting to cross from westbound to eastbound, will be diverted to Island Shop and return to exit. Eastbound to westbound, traffic will be diverted to Trerulefoot Roundabout and return to exit.

• A30, from 8pm July 4 2022 to 6am July 1 2023, slight delays (under 10 minutes): A30 eastbound, Zelah exit slip road closure for improvement scheme, diversion via Henver, junction .

• 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 nine closures will begin over the next seven days:

• A30, from 7pm July 18 to 6am July 22, slight delays (under 10 minutes): A30 westbound, Innis Downs (A391) to Highgate Hill (A39) closed for resurfacing works. Diversion via local authority road and A39.

• A30, from 8pm July 18 to 6am July 20, slight delays (under 10 minutes): A30 Crowlas traffic signals for Openreach works.

• A38, from 8pm July 19 to 5am July 21, slight delays (under 10 minutes): A38 Both Directions Bodmin Parkway to Colesloggitt - two-way signals for Speed Camera Repair.

• A30, from 8pm July 19 to 4am July 20, slight delays (under 10 minutes): A30 both directions Launceston lane closures for barrier repairs.

• A30, from 7pm July 22 to 6am July 23, slight delays (under 10 minutes): A30 westbound, Innis Downs exit slip road closed for resurfacing works. Diversion via A30 westbound to Victoria and return to exit.

• A30, from 8pm July 25 to 6am July 30, slight delays (under 10 minutes): A30 between Chiverton Cross and Carland Cross traffic signals for Chiverton to Carland improvement scheme.

• A30, from 8pm July 25 to 6am July 27, slight delays (under 10 minutes): A30 westbound, Highgate Hill entry slip road closed for horticultural works. Diversion via A30 eastbound to Victoria and return.

• A30, from 7pm August 1 to 11.59pm August 15, slight delays (under 10 minutes): A30 Crowlas temporary traffic signals for Western Power Distribution works.

• A38, from 8pm August 1 to 6am August 3, slight delays (under 10 minutes): A38 Glynn Valley traffic signals for surveys.

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