The electricity transformer is being carried on a vehicle 58m long and 5m wide.
The unit left Luton on Saturday morning, travelling via the M1 and A405 before joining the M25 near junction 19.
Surrey Police advised drivers to “plan their journey accordingly”.
A section of Pinewood Grove will be closed until Monday 22 July, when the load will make its final move to West Weybridge Substation, Parkside, New Haw, Addlestone.
Peter Reynolds sent us this video from New Haw at the end of his road.
