Muara–Tutong Highway, is a major, inter-district highway in Brunei, and is the main road connecting the Brunei Muara and Tutong districts. It is sometimes referred to as the coastal highway due to it being mostly parallel to the coastline of Brunei. The highway is a controlled-access highway for most of its length west of the interchange with the Tungku Highway, until Kampong Tanjong Menugan, just east of Tutong. The remained of the highway is still a dual carriageway limited-access road, with left-in/left-out intersections being the most common type of intersection throughout the route.