Road 18 is a road in northern Iran in Golestan Province and Mazandaran Province. In Golestan it connects Maravehtapeh to Kalaleh, Gonbad-e Qabus, Bandar Torkaman and Bandar-e-Gaz. In Mazandaran, it runs concurrent with Road 22 up until Neka, where it turns towards Caspian Sea coastline and runs parallel to it going through Babolsar, Fereydunkenar and ends at Mahmudabad