The Elizabeth Line, a GBP 19 billion expansion to London’s transport network, has created a 10% increase in rail capacity, reaching 200 million annual riders within its first year of operation. Addressing severe congestion in this 100-kilometer line, Transport for London used advanced digital solutions such as Bentley’s OpenPaths and LEGION to optimize demand modeling, station design, and scheduling, making data-driven adaptations to keep up with evolving urban needs. These tools enabled the line’s phased opening, contributing to rapid reconfigurations that increased capacity and accessibility while saving costs. Shifting commuters from cars to rail has reduced CO₂ emissions by 24.6 million grams daily. The line has expanded the reach to central London, improved public safety, and boosted local economies. As a result, the Elizabeth Line demonstrates a blueprint for digitally enabled sustainable transit solutions, benefiting communities and contributing significantly to London’s GDP.