Modares Expressway (Persian: بزرگراه مدرس‎‎), prior to 1979 Iranian Revolution known as the Shahanshahi Expressway (Persian: بزرگراه شاهنشاهی‎‎; English: Imperial Expressway) is an expressway in Tehran. It starts from north of Tehran at the end of Chamran Expressway in Elahiyeh and goes south and ends in Haft-e Tir Square.