The largest single infrastructure project in the Baltics, Rail Baltica is an 870-kilometer international passenger and freight railway corridor linking Lithuania, Estonia, and Latvia. It will save EUR billions in annual freight transport costs and EUR 7.1 billion in climate change costs, as well as reduce carbon emissions, atmospheric pollutants, and noise to their lowest possible levels. To deliver the project, IDOM established a connected data environment and used Bentley’s open applications for collaborative 3D modeling and clash detection. The teams achieved a 90% accuracy rate transitioning from design to construction, minimizing change orders, and reaching a new level of quality and sustainability in infrastructure management. In addition to saving 5.3 million passenger hours per year, the rail project will dramatically reduce climate change costs, reduce air pollution by 18.3%, and lower noise by 4.5%.