Prepare for traffic backups June 18-25 as workers repair two 92-foot-long expansion joints that  are deteriorating on Interstate 90 near Mercer Island.

Prepare for traffic backups June 18-25 as workers repair two 92-foot-long expansion joints that are deteriorating on Interstate 90 near Mercer Island.

 
This photo shows a closeup of one of the worn out expansion joints that workers will replace.