The ambulance service was called to the junction of Upton Lane and Skelton Road around 2pm yesterday (August 12).
A crew from the air ambulance was also sent in a car and a man was treated at the scene.
He was then taken to hospital “as a priority”.
A London Ambulance Service spokesperson said: “We were called at 2.06pm on Tuesday 12 August to reports of a road traffic collision at the junction of Upton Lane and Skelton Road, Forest Gate.
“We sent resources to the scene, including an ambulance crew, an incident response officer and a paramedic in a fast response car.
“We also dispatched a trauma team in a car from London’s Air Ambulance.
“We treated a man for a leg injury and took him to a major trauma centre as a priority.”