From the Wikipedia page 
Tottenham High Road is the main thoroughfare through the district of Tottenham, in the London Borough of Haringey. It runs from Edmonton in the North (where it becomes Fore Street) to Stamford Hill in the South (where the road becomes Stamford Hill). It follows, for the whole of its length, the course of the erstwhile Roman Road, Ermine Street. South of Bruce Grove the road is part of the A10; to the north it is part of the A1010.