Thursday morning, I was very fortunate to be traveling southbound on I-5 on my way to Wilsonville. I only had a brief delay as we rubbernecked at the tractor-trailer splayed across all the northbound lanes.
Folks heading north were being detoured off of I-5 at 217 based on a predetermined ODOT contingency plan. The fact that such a plan exists is part of an increasing focus on operations and ITS (Intelligent Transportation Systems) as a way to deal with non-recurring congestion.
Why 217? That logic is outlined in Friday’s Oregonian article by Jim Mayer and Steve Beaven.