Issaquah's latest traffic study is set for release sometime within the next few weeks. Preliminary results imply that growth between the years 2000 and 2015 will be so extensive as to consume most the new development opportunity within the submarket within that timeframe.
Looking forward for solutions and alternatives, the city's new report preliminarily predicts the construction of State Route 18 to a four-lane configuration between Hobart Road and Interstate 90—without a new bypass—would reduce traffic within the city by up to 10%. With a bypass, it estimates that the significant congestion on the main thoroughfares of Newport and Front Streets could fall by as much as 51%.
The plateau just north of Interstate-90 is a densely-populated area served by the traffic-clogged downtown Issaquah. Stretching northward from the city, the plateau includes a portion of Issaquah, the young city of Sammamish, and two major developments in unincorporated King County (Klahanie and the Issaquah Highlands). While development in the 800-acre Klahanie is completed, the Issaquah Highlands is just beginning to pick up steam.
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