Sound Transit is still searching for the “root causes” of stalls that led to delays and crowded railcars on its light rail 1 Line this week, a condition executives admit was unacceptable. Unrelated power cutoffs Tuesday and Wednesday blocked part of the twin-tube tunnel, below the University of Washington. Trains alternated on a single track, which slashed service to every 25 or 30 minutes, instead of 10 minutes apart, for most of Tuesday and a couple of hours Wednesday.
Riders were escorted from a stuck train to walk the tunnel Tuesday afternoon, to UW Station 300 feet away.