 The 85.3 km-long segment from Hồng Lĩnh Township across Đức Thọ and Hương Sơn districts is called National Route 8A.There are 36 bridges in this route in which the two longest are Linh Cảm (crosses La River) and Hà Tân bridges.National Route 8A crosses Annamite Range and connects to National Route 1A, Ho Chi Minh Highway and Lao National Route 8.