Wilmington–Ucolta Road is a 100 kilometre major road connecting Port Augusta to Peterborough and beyond to Broken Hill, in South Australia. This name covers many consecutive streets and is not widely known to most drivers except, as the entire allocation is still best known as by the names of its constituent parts: Willowie Road, Petersburg Road, and its concurrency along RM Williams Way. This article will deal with the entire length of the corridor for sake of completion, as well to avoid confusion between declarations.