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

• A38, from 9am February 7 to 4pm March 4, slight delays (under 10 minutes): A38 Twelvewoods to Trerulefoot mobile lane closures for drainage works.

• A30, from 7pm February 7 to 5am March 5, slight delays (under 10 minutes): A30 eastbound and westbound, Penzance to Exeter mobile lane closures for drainage works.

• A30, from 9am February 21 to 4pm February 23, slight delays (under 10 minutes): A30 eastbound and westbound, Highgate exit slip lane closures for Cornwall Council works.

• A30, from 7pm February 21 to 6am February 23, slight delays (under 10 minutes): A30 eastbound, Temple to Colliford Lake lane closures for survey works.

• A30, from 7.30pm February 22 to 5am February 25, slight delays (under 10 minutes): A30 Fraddon westbound, Lane closure for Horticulture works.

• A30, from 7pm March 1 to 6am March 4, slight delays (under 10 minutes): A30 eastbound, Carminow junction, Bodmin to Helland carriageway closure for road markings, diversion via A38 and Old Callywith Road.

• A30, from 7pm March 4 to 6am March 8, slight delays (under 10 minutes): A30 eastbound, Helland exit and entry slip road closures and convoy working for road markings. No access from/to A30 westbound, exit slip diversion via A30 to Cardinham and return, entry slip diversion via Old Callywith Road.

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