Developments with a skybridge or hallway connecting two homes have been popping up all over Seattle in recent years.

FIFE -- The Transportation Department plans to erect a 24-foot-high noise wall along parts of Interstate 5 at Fife as part of a project to add car pool lanes. That's good news for apartment ...

Low-Noise Pavement: Still in experimental use, low-noise pavement is currently being researched. (A test patch was in place on I-5, between Seattle and Tacoma).