Pop quiz hotshot: Think you can tell the difference between a roadway interchange and a Celtic Knot?
On this St. Patty's day, we’re tracing the hypnotic patterns and the interlacing lines of the Celtic knot, cultivating Zen for tomorrow’s hours of pub quiz. Evoking an interconnectedness, a non-differentiation between beginning and end, Celtic knots also conjure something quite a bit less grand: long commutes! Traffic! Road rage!
Wait, what? Got into the Jameson a little early have we? No, we haven’t. Last chance!
But we have noticed a few similarities between the noble knot and something altogether different: The ubiquitous roadway interchange.
FULL STORY: Roadway Interchange or Celtic Knot?

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

San Diego Adopts First Mobility Master Plan
The plan provides a comprehensive framework for making San Diego’s transportation network more multimodal, accessible, and sustainable.

Walmart Announces Nationwide EV Charging Network
The company plans to install electric car chargers at most of its stores by 2030.

Seattle Builds Subway-Sized Tunnel — for Stormwater
The $700 million ‘stormwater subway’ is designed to handle overflows during storms, which contain toxic runoff from roadways and vehicles.

Feds Clear Homeless Encampment in Oregon Forest
The action displaced over 100 people living on national forest land near Bend, Oregon.

Is This Urbanism?
Chuck Wolfe ponders a recommended subscription list of Substack urbanists and wonders — as have others — about the utility of the "urbanist" moniker.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
City of Moorpark
City of Tustin
Tyler Technologies
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions