The road that runs between Apsley and Kings Langley will be closed for up to six nights for resurfacing works.
Parts of London Road and Hempstead Road - also called the A4251 - will be shut off to traffic from 8pm and 5am from Tuesday, January 7 and the works, which are weather dependent, will not be carried out during the weekend.
It is costing Herts County Council £235,000 to repair the worn out road surface, which is being carried out by highways contractor Ringway, along the carriageway that runs between the London Road roundabout and the Home Park Mill Link Road roundabout.
Signed alternative routes will be in place and access to properties will be maintained, with workmen allowing vehicles access when it is safe to do so. Pedestrian access will not be affected.
County Councillor Terry Douris, who oversees Highways, said: “We appreciate that this is a major route and understand that these essential maintenance works are likely to cause disruption and inconvenience both to motorists and residents. We apologise for this and would ask everyone for their co-operation while the work is in progress.”
Alongside this water firm Affinity will be installing a mains supply along London Road opposite the junction with Cavendish Court between January 6 and 16.
Here workmen will use stop and go signs to control the traffic.
Both roadworks have been listed as ‘high impact’ and ‘delays likely’.
Any changes to the proposed start date, duration or working hours will be announced on roadside information boards and is also available by clicking here
Bus routes may also be affected. For details click here and look at the ‘service disruptions’ section.