The biggest load ever transported on Britain's road caused traffic chaos yesterday - thanks to cargo which is heavier than a space shuttle.
An enormous transformer was carried from Didcot power station, but was transported a just 4mph as it weighs an earth-shattering 640 TONNES.
The huge vehicle is 100m long and 5m wide and took up two lanes of the motorway while it crawled to its final destination at walking pace.
It began its slow journey in Oxfordshire on Friday, causing 13-mile long tailbacks when it wound its way along the M4 on Saturday.
On Sunday it continued along the M32 to the transformer's final destination at Avonmouth Docks, Bristol, arriving at 6pm.
The transformer will next be transported by sea to a Siemens plant in Germany.
Police officers escorted the load at the expense of the haulier, Allelys Heavy Haulage.
A spokesman for Wiltshire Police said: 'Police vehicles had to ensure the road and traffic ahead was managed to ensure there was no conflict with the load.
'There are only a few locations where traffic could pass. Police asked motorists to avoid the area and plan alternative travel routes.'
The generator transformer is the second and largest of three being removed from Didcot power station as part of its decommissioning programme.
The first was moved at the beginning of the month.
Didcot, a coal fired power station, was disconnected from the National Grid in March after 43 years of service.