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

And one of them is expected to cause major delays – with motorists facing a holdup of at least half an hour.

The latest expected works list, with notes from National Highways, shows that one closure already in place is expected to carry on this week:

• A38, from 9pm July 21 to 2am September 4, slight delays (under 10 minutes): A38 eastbound, Peartree to Ashburton - lane closure by Wales and West Utilities for installation/removal of closure on Whistley Hill for gas mains replacement works.

And a further six closures will begin over the next two weeks:

• A38, from 7pm August 6 to 6am August 7, slight delays (under 10 minutes): A38 eastbound, Old Haldon Hill exit slip closure for carriageway reconstruction/renewal works, diversion via - A38 to M5, junction 30, M5 and A38 south, A380 and local roads to rejoin Old Haldon Hill.

• A38, from 7pm August 6 to 6am August 7, slight delays (under 10 minutes): A38 eastbound, Kennford to M5, junction 31 lane closures for carriageway reconstruction/renewal works.

• A30, from 8pm August 11 to 6am August 14, slight delays (under 10 minutes): A30 eastbound, Whiddon Down, lane closure for boundary fence repairs.

• A30, from 7pm August 12 to 6am August 13, severe delays (more than 30 minutes): M5 southbound, junction 31 to A38 Belvedere Cross carriageway closed for overhead gantry works. Diversion for A38 traffic via A30 westbound to Sourton Cross, A386 to A38 Manadon. Diversion for A380 traffic via A30 westbound to Alphington, Marsh Barton, A379 and A381. Local traffic for Kennford to split at the Devon Hotel for A379 westbound.

• A38, from 7pm August 12 to 6am August 13, slight delays (under 10 minutes): A38 northbound, Belvedere Cross to Kennford carriageway closed for overhead gantry works. Diversion via minor road past Haldon Racecourse and A380 northbound.

• A38, from 9pm August 18 to 6am August 19, slight delays (under 10 minutes): A38 eastbound, Holdon, lane closure for installation of new average speed cameras.

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