Drivers in the Chippenham and Corsham areas of Wiltshire may experience delays from this afternoon until the end of the month.
An abnormal load is due to leave the M4 Motorway at J17, between 1pm and 2pm, and travel along the A350 towards Chippenham - before travelling along the A4 to Westwells Road, Corsham.
The load, a steel fabricated structure some 4.5m in width, will be escorted by both private and police escort vehicles.
Due to its size, the load will be both slow moving and have the potential to cause congestion in places where oncoming traffic will be required to pull in and wait. Traffic travelling behind the move will not be able to overtake.
Wherever possible, disruption will be kept to a minimum although both hauliers and motorists are asked to please be patient should they come across this load. Anyone travelling over this period on time critical matters should allow sufficient additional time for their journey.
This is one of a series of abnormal loads that will run either daily or on alternate days along the same route until the end of November.
Police escorting resources are being provided by officers, paid for by the haulier at no cost to the public.