The long section is a long, steep, narrow and winding road. Due to physical constraints, it was open only to buses, taxis and permit-bearing vehicles only and speed limit is set to 30 km/h. being too dangerous for double-decker buses to be trafficable and only single-deckers are used in the bus services. It starts near Ma Wan New Village and joins Chung Yan Road near a river before proceeding upwards to the valley between Sunset Peak and Lantau Peak. It reaches its highest point at a pass in Pak Kung Au (also known as Tung Chung Au) then follows a steep downhill route. The southern end joins South Lantau Road in Cheung Sha.