National Highway 01 or NH01, formally called the Ring Road, is a 2,200-kilometre two-lane road network circulating inside Afghanistan, connecting the following major cities : Kabul, Maidan Shar, Ghazni, Kandahar, Delaram, Herat, Maymana, Sheberghan, Mazar-i-Sharif, Puli Khumri and back to Kabul. Wikipedia