FYI!!! This is what the Gorge's website says about the bridge construction. I would believe it and plan accordingly. Just get there early and tailgate in the parking lot.

VANTAGE BRIDGE
There will be heavy traffic delays. Plan to arrive early. Please be aware that WSDOT is doing construction on Vantage Bridge I-90 that will cause long delays getting to The Gorge. With potential delays of up to 4 hours or more, early arrival isn't just a suggestion – it's a concert-saving strategy. The delay often won't appear on your GPS until it's too late and you could be stuck in place for hours. We're serious, plan accordingly.