The incident happened on Gale Street near Porters Avenue at 8.50am today (December 4).
An ambulance attended the scene and treated a teenage girl before taking her to hospital.
Her condition is unknown at this stage.
Gale Street remains closed both ways and a detour is in operation for bus routes 61 and 145.
We have contacted the Metropolitan Police for further information.
A spokesperson for London Ambulance Service said: “We were called at 8.50am today (4 December) to reports of a road traffic collision in Gale Street, Dagenham.
“We sent an ambulance crew to the scene.
“We treated a teenager at the scene and took her to hospital.”
