In response to the growing demand for public transportation in Egypt, transportation authorities face the challenge of selecting technologies that meet often conflicting requirements, such as high capacity, safe service, urban integration, limited environmental impact, and budget constraints. To meet these competing demands, the chosen technology must ensure sustainable urban transportation. Although monorail systems have existed globally for some time, recent developments have led Egyptian transportation authorities to consider the monorail as a key competitor to meet Egypt's mass transit needs. To assess the sustainability of the monorail, this research focuses on identifying global Transport Key Performance Indicators (KPIs) for sustainable urban transportation and evaluating their applicability to the Egyptian context. These indicators were then applied to the Administrative Capital Monorail project in Egypt. The study concludes that the planning of the monorail in Greater Cairo has a significant environmental, economic, and social impact on the entire region. Furthermore, the monorail is identified as a mode of transport that supports the sustainability of urban transportation. The research concludes with a set of recommendations to align with these KPIs and promote the concept of sustainable urban transportation.