When Sound Transit decided to expand the light rail system in Seattle, Washington, USA, it had to find a way to tunnel under the densely populated city without disrupting life above ground. Seattle was the second worst city in the U.S. for time commuters were stuck in traffic. The University Link Light Rail Extension extended the light rail system 3.2 miles (5 kilometers) through underground tunnels providing relief for roadway congestion. The rail line opened months ahead of schedule, and the project closed US$200 million under budget. This project was a finalist for the 2017 PMI Project of the Year Award. Learn about this awarded project’s challenges, best practices, and lessons learned in this webinar.