The expansion of the world’s transit systems continues at a rapid pace. In 2025, more than 1,000 kilometers of new urban rail lines—metros, light rail, and tramway systems—opened for service, and the same will be true in 2026. Regional rail, bus rapid transit, and aerial tram lines are also planned for opening. In this annual post, I review all of the urban transit projects around the globe that are planned for 2026—and list those that were completed in 2025.