Overturned semi-truck snarls traffic

A rainbow arched across the Highlands Drive exit off Interstate 90 during the Tuesday evening commute, but there was no pot of gold for drivers. Instead, they were treated to a closed off ramp and miles of backups that clogged both highway lanes and alternate routes throughout Issaquah.

A rainbow arched across the Highlands Drive exit off Interstate 90 during the Tuesday evening commute, but there was no pot of gold for drivers. Instead, they were treated to a closed off ramp and miles of backups that clogged both highway lanes and alternate routes throughout Issaquah.

The trouble began around 5 p.m. when a semi-truck loaded with I-beams overturned and spilled its load at the bend in the Highlands Drive off-ramp . I-90 was closed for about an hour as one of the beams teetered over the railing endangering eastbound vehicles.

A Washington State Patrol spokesperson said the truck driver was likely going too fast for the road conditions, which were slick from intermittent rain.

No other cars were involved in the accident, and the truck driver sustained no injuries.