Issaquah Hobart Road Corridor Study
GMVUAC PresentationJune 1, 2009
David Mark and Jim Ishimaru Road Services Division
King County Department of Transportation
Study Area Boundary
Study Purpose:Analyze existing and future traffic conditions
along the Issaquah-Hobart Road CorridorDevelop short & long term Transportation
project recommendations, consistent with Comprehensive Plan policy direction
Use a new subarea traffic model to test different “what if” scenarios
Establish an Interagency Technical Advisory committee to help finalize recommendations
Current Conditions and IssuesIssaquah-Hobart Road functions as an Urban
Connector with unique rural characteristicsFrequent accidents along entire length of
Issaquah-Hobart RoadSafety/parking issues near hang-glider areaSlow-moving commute traffic Intersection delay at SE May Valley Road &
Cedar Grove Road intersectionsFifteen mile creek bridge needs replacement
Issaquah- Hobart Road: Accident data, 2004-2007
Future traffic issues / deficiencies
Project Recommendations - Short termInstall No Parking signs near Hang Glider
ParkInstall traffic cameras at Cedar Grove Road
and May Valley Road intersections to monitor traffic conditions
Install digital message sign near SE Mirrormont Blvd
Interconnect signals at Cedar Grove Road and May Valley Road to allow intersections to be controlled at traffic center
Review for possible new warning signs at high accident locations
Initial Project Recommendations – Long termComplete SR-18 widening from Issaquah-Hobart Road
to I-90Replace Fifteen mile creek Bridge Expand existing Hang glider parking lotConstruct roundabouts at intersections with May
Valley Road & Cedar Grove RoadImprove channelization from May Valley Road to
Issaquah City LimitsInstall fiber optics, flood sensors and weather station
in the corridor
Next stepsWork to include project recommendations in
our Six Year Capital Improvement Program
Work with local jurisdictions and UACs to address other SE King County traffic needs
Comments? Suggestions?Contact:
David Mark, Supervisor, Technical Data Group Phone: (206) 263-6273 Email: [email protected]