Seattle City Light is urging drivers who typically use Exit 166 from Interstate 5 to Stewart Street to consider alternate routes through March 24 while construction of an underground network associated with the future Denny Substation reduces Stewart Street by two lanes between Yale and Boren.
Traffic congestion has delayed drivers using the Stewart Street exit by as much as 45 minutes. Other routes offer a faster alternative.
Work at the site involves a large excavation that would be unrealistic to cover with plating that would allow traffic when construction is not underway.
City Light’s contractor is working 12 hours a day to complete the project as quickly as possible. Night work is not currently permitted at the site.