Supporters of building a freeway-based monorail along I-5 in Seattle, WA, are aggressively promoting the propoal.
"It started with a graduate student's thesis and grew into an idea with broader appeal -- why not build a monorail along Interstate 5 to carry commuters between North Seattle and Sea-Tac Airport and perhaps beyond? Apprentice architect Jeff Boone started the effort by completing a University of Washington master's thesis on the subject two years ago. He began researching I-5's impact on the city since its completion, and how its space might be better used.He soon came around to the monorail idea. It was a form of mass transit with a narrow footprint that he calculated could fit within the freeway right-of-way, potentially moving thousands of people and relieving congestion without displacing homes or businesses." [Includes a map of the proposed route.]
Thanks to Joshuah D. Mello
FULL STORY: I-5 monorail idea gathering steam

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Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

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Gallatin County Department of Planning & Community Development
Heyer Gruel & Associates PA
Mpact (founded as Rail~Volution)
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City of Laramie