Traffic delays as 112-tonne reactor driven to Pontypridd
Traffic delays are expected as a slow-moving lorry delivers a 112-tonne shunt reactor to an electricity substation in Rhondda Cynon Taff.
The National Grid delivery left Goole in East Yorkshire on Thursday and is expected at Cilfynydd, near Pontypridd, on Saturday morning.
The lorry can only travel at 30mph (48km/h) but just 10mph (16km/h) between the A472 to the substation.
It will travel along the A48 from Newport and up the A470 and A472.
The special heavy haulage vehicle will have a private escort and National Grid said it expected the delivery would cause disruption until it is delivered at about 10:00 GMT.
It is 25m (82ft) long, 5m (16ft) high and 3m (10ft) wide.
National Grid project engineer, David Shaw, said: "There are likely to be some delays on the motorway and on smaller, narrow roads close to the substation.
"I'd like to thank people for their patience in advance of our work."
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