The A40 is Northolt has reopened after a man fell from the Target Roundabout this morning (August 30).
London Air Ambulance (LAS) were called at 11.15am to reports of a person fallen from a height, with Met police arriving shortly after.
The man was taken to a central London hospital after the Air Ambulance had arrived.
Met police said he had suffered serious injuries but his condition is not yet known at this time.
The A40 between the Greenford Flyover and the Target Roundabout was closed shortly after the incident, but Transport for London (TfL) said the road was reopened at around 12.30pm.
LAS said: "We were called at 11:15am to reports of a person fallen from a height in Northolt.
"We sent an ambulance crew, a single responder in a car, an incident response officer and our hazardous area response team to the scene, alongside London's Air Ambulance.
"We treated a man at the scene and took him as a priority to a hospital in west London."