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

And one of them is expected to cause moderate delays – with drivers facing a wait of between 10 and 30 minutes.

The latest expected works list, with notes from National Highways, shows that four closures are due to start this week:

• A405, from 10pm May 16 to 6am May 21, moderate delays (10-30 minutes): M1 southbound, junction 6A to junction 6, Lane and slip road closures for resurfacing works, diversion via National highways network.

• M1, from 9.30am May 19 to 4pm May 25, slight delays (under 10 minutes): M1, junction 6 to junction 5 southbound, Hard Shoulder closure for testing works.

• M1, from 10pm May 26 to 5am May 27, slight delays (under 10 minutes): M1 northbound, junction 4 to junction 6, Lane closures for safety fence works.

• M1, from 11pm May 27 to 5am May 28, slight delays (under 10 minutes): M1 southbound, junction 6a to junction 5, Lane closure for safety fence works.

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