All lanes of east and westbound SR 18 have reopened after being fully blocked near Tiger Mountain Summit on Friday morning.
According to State Trooper Rick Johnson, there was a semi vs. motorcycle collision. The passenger from the motorcycle has serious injuries. State Troopers are investigating the incident.
Emergency crews were on scene. Travelers should expect delays.
Issaquah-Hobart Road Southeast and city streets are not suitable for freight traffic, WSDOT reminded drivers.
The roadway was fully reopened by 10 a.m., WSDOT confirmed.