Skip to Content
Streetsblog USA home
Streetsblog USA home
Log In
Complete Streets

Engineering Insanity on Display: The Diverging Diamond Interchange

Charles Marohn is the critic the transportation engineering field desperately needs.

Over and over again, this former traffic engineer and head of the engineering reform nonprofit Strong Towns has made himself the voice of reason to a field gone mad on automobiles.

His latest coup is a sardonic verbal takedown of a nightmare "complete street" interchange that Missouri engineers are calling "progress." But the design is less than revolutionary, preserving the field's allegiance to almighty car capacity. The project's real triumph is in finding ways to satisfy the most basic elements of complete streets while completely missing the spirit of the movement.

Says Marohn of the video:

Did we need more proof that the engineering profession is insane than this video of the "diverging diamond"? If we had infinite resources (we don't), this would still be crazy, but the fact that we're broke just shows you how insulated from reality so many of them are.

Sometimes I feel as if I'm shouting into the wind with the engineering profession. This may just be more of that. If nothing else it was therapeutic to me.

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

Talking Headways Podcast: Transit Themed Rock Music

Meet a band that writes exclusively about the car-free life on public transit. And it rocks!

October 3, 2024

Thursday’s Headlines Are Down on the Corner, Out in the Street

Bring a nickel, tap your feet as you avoid having to get into your car to drive out to the big-box strip mall.

October 3, 2024

Room for Improvement: What New York’s Subway System Can Learn from Cities Around the World

New York’s subway was once an international model of modernity. But it's not anymore.

October 3, 2024

Subway Elevators are Not Just a Nice Lift, But a Basic Civil Right

Accessibility is a must-have as cities compete to attract visitors and retain residents.

October 3, 2024

Eight Ways To Reimagine Parking Spaces

This Park(ing) Day, 175 groups across multiple countries transformed curbside parking stalls into bedrooms, terraces, living spaces and more.

October 3, 2024
See all posts