The Lusaka–Mongu Road of Zambia runs 580 km from the capital, Lusaka, to Mongu, capital of the Western Province. It connects that province to the rest of the country, as well as being one of two routes to the south-west extremity of North-Western Province. It also serves as the main highway of the western half of Central Province. The entire route from Lusaka to Mongu is designated as the M9 road.
Road development was slower to start in the west of the country than in other parts. A dirt road was built from the Great North Road at Landless Corner to Mumbwa in the early 1930s (today designated as the M20 and now known as the "Old Mumbwa Road"), but was not extended to Kaoma and Mongu until 1937, about ten years after road transport started in other provinces. This road to Mongu did not have the same recognition and maintenance as the better-known Great North Road and Great East Road, and was also for a time only the third most used route to the west. A route by ox wagon and boat up the Zambezi from Livingstone was the most used in the first decades of the 20th century. A road was made from Mululwe, the end of the Mulobezi Railway, along the banks of the Luampa River and then across the sandy plain to Mongu about the same time that this road was built and, thanks to the railway, was used more, until the 1950s.