From the Seattle Times, via Daily Durning:

Seattle will develop a plan to toll city roadways as part of its efforts to reduce traffic congestion and greenhouse-gas emissions, Mayor Jenny Durkan said Tuesday.

Details of what such a plan might look like are sparse, and will hinge on a tolling study focused on downtown neighborhoods that should have initial results later this year. …

Durkan said she was hopeful a congestion-pricing system could be in place by the end of her first term, in 2021. …

Seattle could implement tolling within the city without the permission of the state Legislature, but it would almost certainly require the approval of city voters.

In 2015, 56 percent of Puget Sound-area voters said systemwide tolling was a bad or very bad idea, according to a poll from the Puget Sound Regional Council. …

Revenues from congestion pricing would be used to increase transit service throughout the city and to support more electric transportation infrastructure, Durkan said. …

Limited tolling is already coming to downtown Seattle, with the opening of the Highway 99 tunnel, scheduled for later this year. But the state Transportation Commission continues to struggle deciding how much to toll and when to start tolling.