Alexandria's historic downtown consists of multilayers of history. The archaeological layers of the city always have been viewed as an obstacle to any real development in the old city. Moreover, the present urban intervention framework avoids and prevents any deep development in the historic districts due to the presence of the archaeological layers underneath. This study will explain the aspects of the present mobility problem in Alexandria downtown and discuss the possibility of constructing underground metro lines in archaeological Alexandria districts as a mass transit system integrating with urban archaeology. Alexandria Strategic Urban Plan 2032 - Alexandria SUP 2032 is proposing new urban communities to release density in the existed built city. Concerning the effectiveness of the proposed solutions for traffic congestion in the historic downtown. So, this study will take the analytical comparative method discussing the approaches of similar historic cities to cope with the city growth while displaying urban archaeology in their metro line projects as a unique and powerful point of integration. This approach is supposed to promote a sustainable mobility system that will solve traffic congestion, breakthrough reimaging, and encourage tourism while solving urban expansion issues at the same time in Alexandria's historic downtown.