Construction of Interstate 70 in Denver, looking west towards the mountains - circa 1964 (Image courtesy CDOT)
Construction of Interstate 70 in Denver, looking west towards the mountains - circa 1964 (Image courtesy CDOT)

Divided Highways

Learning about the full history of the U.S. Interstate Highway System

Published: 29 Apr 2021

Topics: History, Travel

TL;DR: As with many things in America, the history of our greatest achievements is complicated and baised

Asking Questions

As things so often happen these days, it started with a tweet.

My nerdy little tweet

After reading the fantastic book The Color of Law by Richard Rothstein which focused on the racist laws and loan-guidence maps created to keep people of color out of certain parts of cities all across the United States, I started looking into the history of zoning in Denver.

Soon after, I learned about the neighborhoods of Globeville and Elyria-Swansea which were split in half by Interstates 25 & 70, just north of downtown Denver. As is often the case, these two neighborhoods were (and still are) largely minority neighborhoods.

“Residential Security Map” (commonly known as a redlining map) of Denver

Although I have not yet done the research, I suspect that the placement of the interstates through these neighborhoods was not just based on logical routing, but has to do with redlining in Denver and lack of political power during planning and construction of the interstates in the early 1950s and ’60s.

Resources Shared with Me

Although Twitter can be a hellscape of vitriol; if you find the right community of people interested in the same thing it can actually be quite useful. Because threads and replies are difficult to follow, I’m creating this list of resources that were shared with me.


Books I’m Reading

Books currently on my desk and in various stages of reading

The Big Roads by Earl Swift

I’ve only started the first few chapters, but this seems like a well-balanced book that includes an entire section (strangely entitled “The Human Obstacle”) which goes in-depth about the planning and construction of Baltimore’s US Hwy. 40 and I-70 (which I just learned ends/begins in a parking lot?!.

The Folklore of the Freeway by Eric Avila

If there was only one book that I would recommend, it would be this, but it certainly veers towards being academic-to-the-point-of-wanting-to-stop-reading. It is well written, but dense, which is shown in this single sentence (!) that I read last night:

“How to reconcile this white neighborhood uprising with the simultaneous crisis of race and poverty in the inner city remains a historiographic riddle, for fighting freeways did not entail a concomitant struggle against the entrenchment of urban racial poverty, it did not challenge the new patterns of racial segregation enacted by highway construction, and it did nothing to secure a more equal footing for African Americans and other peoples of color in the political geography of the city.”

That being said, I do think this is a very well-researched book and I can already tell that it is worth perservering through to the end.

Divided Highways by Tom Lewis

I’ve not yet received this book from the library, but this blurb from Publishers Weekly seems like a good enough reason to pick it up:

“This brightly written history of the U.S. federal highway program is like the annual report of a successful company that has had grim second thoughts. The first half recounts progress made, while the second suggests that the good news is not quite what it seems.”

In the Shadows of the Freeway by Lydia Otero

This book was sent to me directly by Lydia and I’m looking forward to reading the personal memoir of someone who experienced the changes that an interstate brought to their neighborhood firsthand.


Other Books Recommended to Me


Much More to Learn

As with any good rabbit hole, the more I learn; the more I want to learn. I’m not a urban-planning nut nor do I have strong views on modernist city planning after World War Two, but I am curious about the built world around me.

Right now, there is a new I-70 project going on in Denver that is trying to repair (to a tiny degree) the disruption of Globeville and Elyria-Swansea and this attempt to unite a long-divided neighborhood is interesting to me.

Divided Highways: The Interstates and the Transformation of American Life

For now, I just need to find time to watch the 1997 documentary film Divided Highways: The Interstates and the Transformation of American Life by the author who wrote the book mentioned above.

Further Reading & Writing