Update: Traffic was clear on state Route 512 around 9:25 a.m.
Initial story: A three-car collision on state Route 512 at Canyon Road has traffic backed up to Meridian in Puyallup, but all lanes are open.
Vehicles are on both shoulders of the freeway.
The spectacle is causing a two-mile backup.
Washington State Patrol troopers and firefighters are on scene, but the accident is reported to be not serious, Brooke Bova with the State Patrol said.