Metro and light rail projects are expanding rapidly in Saudi Arabia to address congestion challenges in major cities. Key rail projects currently under construction or planned include systems in Riyadh, Jeddah, Madinah, and Makkah. Integrated project management and public education are needed to minimize disruption during construction in congested areas. Rail systems will require changes to existing transportation networks and urban planning to maximize economic and development benefits by improving accessibility and attracting business activity near stations. The expansion of rail presents both opportunities and challenges for existing transportation providers to adapt their roles and integrate services.