The road system in Peace River is on a grid where roads are numbered with avenues run east to west and streets run north to south. Postfix letter "A" is added to the name numbers of street that do not conform to the grid, lying between two streets that conform. With 100 Avenue and 100 Street located in the downtown core, the avenue numbers increase southwards and street numbers decrease eastwards. Some roads still bear the historical street names assigned in the pioneering days, in addition to the modern road numbering nomenclature, especially in the downtown area.