Barack Obama has won 303 electoral college votes in the US election compared to Mitt Romney's 206.
Florida, which has 29 electoral votes, is the only state yet to declare - the President currently has a slender lead in the sunshine state.
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A 61-year-old woman was taken to hospital with head injuries after the incident in Islington, north London.
Counting will begin on Saturday morning, with the result expected later in the day.
There have been a number of incidents involving heavy goods vehicles getting stuck and causing disruption in recent months.