Sound Transit Working on Link Noise Issues
http://www.soundtransit.org/News-and-Events/News-Releases/Work-addressing-Rail-Noise-Begins.xml
Work is underway to quiet the light rail tracks. Methods used will include automatic track lubricators and switch work.
This has been an ongoing issue with the system, the amount of noise, primairly squealing, the trains make as they run on the line. Hopefully this work will lessen, if not solve, the problem.
Ben