The Lateral Road is Bhutan's primary east–west corridor, connecting the towns of Phuentsholing in the southwest to Trashigang in the east. Notable settlements that the Lateral Road runs through directly are Wangdue Phodrang and Trongsa. The Lateral Road also has spurs connecting to the capital Thimphu and other population centers such as Paro and Punakha. As with other roads in Bhutan, the Lateral Road presents serious safety concerns due to pavement conditions, sheer drops, hairpin turns, weather and landslides.