The London Fire Brigade was alerted to the fire on the A406 North Circular at 10.38am this morning (March 21).
Two fire engines from stations in Willesden and Acton were dispatched to the scene, where they currently remain putting out hotspots.
The fire has closed the eastbound approach of the major road between Hanger Lane and junctions for the A404.
At the scene, crews discovered a lorry containing scrap metal was on fire and worked to extinguish the flames using a 32-metre turntable ladder from Wembley Fire Station.
It is understood that the fire broke out in the cargo hold of the vehicle.
A single lane of the A406 has now reopened, and motorists continue to be advised to avoid the area in the wake of the fire.
An LFB spokesperson said: “Firefighters have been at the scene of a lorry fire on the A406 North Circular in Park Royal. A lorry trailer containing scrap metal was alight.
“The fire has now been extinguished but crews remain on scene damping down hotspots.
READ MORE: LIVE updates as serious lorry fire causes severe delays near Park Royal
“The A406 has been closed eastbound between the Hanger Lane and A404 junctions but one lane has now reopened.
“This incident has been causing significant traffic disruption locally and motorists are advised to continue avoid the area and find alternative routes.
“The Brigade was called at 1038 and two fire engines from Willesden and Acton fire stations have been at the scene. A 32-metre turntable ladder was also at the scene from Wembley Fire Station, which was used to extinguish the fire from above.”
