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Greg GRIFFIN

@gregpgriffin.bsky.social
1.4K followers 367 following 223 posts

PhD, AICP. HusbandFather biking & researching safe and connected communities in the Western Cascades and Willamette Valley. gregpgriffin.com

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Greg GRIFFIN @gregpgriffin.bsky.social · 11/09/2026
Counted bicyclists as a volunteer for @pbotinfo.bsky.social after my workday; this evening at SE 96th & Division. This is only about 30 mins of time lapse, but biking didn’t pick up much at this tough intersection. Learn abt their program at www.portland.gov/transportati...
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Greg GRIFFIN @gregpgriffin.bsky.social · 08/09/2026
Portland is known for its great on-street biking, but trails are few and far, despite some good planning. This piece shows more about why plans sit on shelves, and how to spur action:
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Princeton University Press @princetonupress.bsky.social · 07/08/2026
Before your college students head to campus, give them the secret to college success. Jeffrey Beneker has distilled Plutarch’s essay into ten essential pieces of advice which together comprise an ancient guide to success in college. Read more in ideas. press.princeton.edu/ideas/how-to...
press.princeton.edu
How to succeed in college the old-fashioned way
Around two thousand years ago, in a Greek city that had long been both politically and culturally under the sway of the Roman empire, a teenaged boy named Nicander participated in a coming-of-age ritu...
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Greg GRIFFIN @gregpgriffin.bsky.social · 17/07/2026
Remembering a pretty great faculty workshop @trecpdx.bsky.social in 2022, where I learned a lot about designing and teaching bicycle intersection safety from @pkoonce.bsky.social. flic.kr/p/2nzASwY
flic.kr
2022 IBPI Faculty Workshop
Faculty Workshop: Integrating Bike-Ped Topics into University Transportation Courses. Hosted every summer since 2012, this two-day course supports transportation planning and engineering faculty in in...
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Greg GRIFFIN @gregpgriffin.bsky.social · 11/07/2026
Researchers—ever wonder how your study could better address a root cause? Join these dialogues on Petter Næss’ contributions to planning with critical realism:
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Oscar Oviedo-Trespalacios @ooviedot.bsky.social · 16/02/2026
We often study cycling crashes by isolating factors: infrastructure, behaviour, vehicles, policy. But safety doesn’t live in any one of them. Our new paper argues crashes persist because the system adapts — and proposes a 20-year research agenda focused on prevention. doi.org/10.1016/j.ia...
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Bristol University Press @brisunipress.bsky.social · 01/07/2026
50% OFF EVERYTHING IN OUR SUMMER SALE! 🌞 Choose from paperbacks and hardcovers, and explore everything from career-enhancing resources to fascinating new topics. Use code BUP07 at checkout until the end of July. 🛍️ bristoluniversitypress.co.uk/bup-ho…
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Jeffrey Tumlin 🏳️‍🌈 🌁 @jeffreytumlin.bsky.social · 22/06/2026
With extraordinary graphics, NYT examines how federal policies prioritizing car passenger safety have resulted in big increase in pedestrian deaths. Gift link: www.nytimes.com/interactive/...
nytimes.com
The Deadly Rise of Giant Trucks and S.U.V.s (Gift Article)
The vehicles on American roads have grown larger — and they are killing thousands more pedestrians, a Times investigation found.
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Greg GRIFFIN @gregpgriffin.bsky.social · 22/06/2026
Platform capitalism commodifies goodwill sharing into AI for someone else to sell. Here’s why I nonetheless proceeded with caution: ⚠️ gregpgriffin.com/posts/071g8o...
gregpgriffin.com
Why I Chose Open Science for Transport Truths — Greg P. Griffin, Ph.D.
“Unlike laws and sausages, the public should see science during its manufacture…,” so claims philosopher John Wilkins . Yet, AI companies hoovering public knowledge to be re-sold to new publics is ...
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Rethink35 @rethink35.org · 11/12/2025
Yet another damning analysis of the CAMPO and TxDOT modeling used to justify the I-35 expansion... "Transport Truths" by @greggriffin.bsky.social published by Bristol University Press, devotes a whole chapter to the I-35 project. bristoluniversitypress.co.uk/transport-tr...
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Greg GRIFFIN @gregpgriffin.bsky.social · 27/05/2026
Community and regional planning struggles to define a ‘good’ process. I introduce why 🧏‍♀️ access 📖 transparency 🌍representativeness 👯 social learning, & 👩‍⚖️ legitimacy are key in Transport Truths. Open access ch. 1 at doi.org/10.51952/978...
doi.org
Crossref
Choose from multiple link options via Crossref
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Greg GRIFFIN @gregpgriffin.bsky.social · 17/05/2026
I lament the early days of social media, when technology was lauded as democratizing communication power. Now, AI reverses this power, hoovering wisdom of the crowds as a product of new capital.
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Greg GRIFFIN @gregpgriffin.bsky.social · 05/05/2026
Portland could bike more on a beautiful spring day. It’s lovely out here! 📊 on @counterpointapp.org
Traffic count results showing 2% bicyclingPhoto of bicyclist passing a bike share station in Portland, Oregon
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Greg GRIFFIN @gregpgriffin.bsky.social · 28/04/2026
“A.I. is less regulated in America than sandwiches,” said Prof. Tegmark… “You can’t open a sandwich shop without having your kitchen inspected. But you can release an A.I. girlfriend for 11-year-olds and that’s fine.” www.nytimes.com/2026/04/28/t...
nytimes.com
Et Tu, Brute? What Elon Musk’s Clash With Sam Altman Is Really About.
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Greg GRIFFIN @gregpgriffin.bsky.social · 23/04/2026
#musicforgeographers 🎵Now we can laze through the density🎤 Lock in the Lidar music.apple.com/us/album/lid...
music.apple.com
Lidar by Bruce Hornsby on Apple Music
Song · 2022 · Duration 4:19
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Greg GRIFFIN @gregpgriffin.bsky.social · 24/03/2026
Envisioning a profligacy of American sidewalk construction 🚧
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BikePortland @bikeportland.org · 24/03/2026
Her app has logged 100,000 bike lane obstructions since 2017. Come meet Christina from @bikelaneuprising.bsky.social at Bike Happy Hour tomorrow!! (Weds 3/25) bikeportland.org/2026/03/24/t...
bikeportland.org
This week at Bike Happy Hour: Bike Lane Uprising Founder Christina Whitehouse
This week at Bike Happy Hour our special guest is Bike Lane Uprising Founder Christina Whitehouse. Founded in 2017 after Christina suffered a very close call, this app and website has spurred of a ...
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Greg GRIFFIN @gregpgriffin.bsky.social · 03/02/2026
Shorter than some social media posts: www.nytimes.com/interactive/...
nytimes.com
Annotating the Judge’s Decision in the Case of Liam Conejo Ramos, a 5-Year-Old Detained by ICE (Gift Article)
Our critic annotates the barbed wordplay of a decision challenging the Trump administration’s theory of executive power.
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Greg GRIFFIN @gregpgriffin.bsky.social · 09/01/2026
“For Porter, it is not realism that defines the Trump era but rather its ‘corrupt cousin,’ machtpolitik, which pursues power for its own sake and is defined by a “sort of violent exhilaration of destruction, nihilism and vengeance.” www.nytimes.com/2026/01/09/m...
nytimes.com
The Theory That Gives Trump a Blank Check for Aggression
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Greg GRIFFIN @gregpgriffin.bsky.social · 07/01/2026
is feeling paranoid that most written text on the Internet is AI generated. Three-word sentences have their place, but they’re everywhere and consuming too much copy. Substack pushing feed, Trump administration are worst culprits at the moment. Gonna bike to lunch 🚲
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Greg GRIFFIN @gregpgriffin.bsky.social · 02/01/2026
Self-Driving Cars Can’t See Without Their Eyes by Nicolas Gourault www.nytimes.com/2026/01/02/o...
nytimes.com
Opinion | Self-Driving Cars Can’t See Without Their Eyes
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Greg GRIFFIN @gregpgriffin.bsky.social · 29/12/2025
What mammal might make tracks like these, big set and tiny close together, spaced 2-3’ apart? Cascade range, Oregon. Nordic ski for scale.
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Greg GRIFFIN @gregpgriffin.bsky.social · 22/12/2025
The dept. of ed. is using bicycling graphics to make the FAFSA fun and cool. Maybe it was leftover from the previous administration 🤷‍♂️ If the goal was to help this parent contributor help, it worked.
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Greg GRIFFIN @gregpgriffin.bsky.social · 05/12/2025
Reminder that you can update your federal tax withholding to reduce your pre-payments.
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Greg GRIFFIN @gregpgriffin.bsky.social · 23/11/2025
“Writing criticism — offering an opinion, putting one’s skin in the game — is a form of stewardship to the commons…” writes @meganeogrady.bsky.social, reviewing @zadiesmith.bsky.social’s ‘Dead and Alive .’ www.nytimes.com/2025/10/28/b...
nytimes.com
Zadie Smith Considers Art in the Age of Relentless Progress
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Jonathan Maus @jonathanmaus.bsky.social · 21/11/2025
this is amazing!!
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Greg GRIFFIN @gregpgriffin.bsky.social · 20/11/2025
Rest in power, Kit Kat. www.nytimes.com/2025/11/15/u...
nytimes.com
Waymo Was Thriving in San Francisco. Then One of Its Driverless Cars Killed a Cat.
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Greg GRIFFIN @gregpgriffin.bsky.social · 19/11/2025
Indigenous rights attorney ‘called the outreach “deeply ironic,” noting that the federal government is asking tribes, whose members were the first peoples of the region, to participate in detaining immigrants who arrived more recently.’ www.king5.com/article/news...
king5.com
Nisqually Tribe says it won't allow ICE detainees in tribal facilities
Chairman E.K. Choke said denying the request was in line with the tribe's values of treating all individuals with dignity, respect and compassion.
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Greg GRIFFIN @gregpgriffin.bsky.social · 16/11/2025
Imagine if we managed cities by outcome (fatality reduction), rather than outputs (call responses). Maybe fire & police could get on board w Safe Systems.
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Greg GRIFFIN @gregpgriffin.bsky.social · 14/11/2025
“Don’t shoot until the subject hits you in the pit of your stomach” was her advice to her pupils. www.nytimes.com/2025/11/13/a...
nytimes.com
Pioneering U.S. Street Photography, With Vienna in the Background
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Greg GRIFFIN @gregpgriffin.bsky.social · 14/11/2025
youtube.com/shorts/OWnLs...
youtube.com
PBOT Vision Zero Roadway Reorganization Explainer
YouTube video by Portland Bureau of Transportation
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Jarrett Walker @humantransit.bsky.social · 10/11/2025
All print books are 50% off at Island Press, including my book Human Transit, the book that welcomes everyone into clear thinking about public transit! Stock up for the holidays! Print edition only (because giving ebooks is no fun)! islandpress.org/books/human-...
islandpress.org
Human Transit, Revised Edition
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OPB @opb.org · 10/11/2025
"The Big Dig" podcast from Boston came to town for a conversation with OPB’s Lillian Karabaic, whose "Stop Requested" project looked into public transit across Oregon, about Portland’s own attempts to solve that puzzle and undo the harms of the past.
opb.org
‘The Evergreen’: What to do about freeways
Every American city — including Portland — is divided by crumbling old highways, and every city is trying to figure out what to do with them. Listen in this week as "The Big Dig" podcast in Boston joins in.
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Greg GRIFFIN @gregpgriffin.bsky.social · 10/11/2025
The Promise of the Bronx River Parkway www.nytimes.com/2025/11/09/o...
nytimes.com
Opinion | The Promise of the Bronx River Parkway
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Greg GRIFFIN @gregpgriffin.bsky.social · 08/11/2025
Motion to create a new city staff position for Odnarodude stateside.
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David Zipper @davidzipper.bsky.social · 08/11/2025
@bmj.com, a renowned health journal, slams car bloat: "Cars are becoming steadily larger, [and] with this comes potential harms to health...Action is needed locally, nationally, and internationally to curb sales of new SUVs and to reduce their presence in urban areas." www.bmj.com/content/391/...
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Greg GRIFFIN @gregpgriffin.bsky.social · 07/11/2025
Today’s Friday, and downtown Portland is doing alright. Mark me as safe 😜
Bicyclist turning across the new 4th Ave bike lane in Portland, OR.Park Blocks in fall foliage, Portland, OR
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Greg GRIFFIN @gregpgriffin.bsky.social · 04/11/2025
City leaders need to consider biking, scooting, and transit more when shaping urban areas.
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Greg GRIFFIN @gregpgriffin.bsky.social · 24/10/2025
My latest op-ed in the Austin American-Statesman shows the risks that TxDOT and other DOTs take when they self-approve environmental reviews. This finding is a small part from my research on the book Transport Truths (Bristol University Press, 2025) www.statesman.com/opinion/colu...
statesman.com
In the I-35 rebuild through Austin, will speed trump trust? | Opinion
The $4.5 billion TxDOT project shows what happens when an agency charged with building also decides how much scrutiny it deserves, Greg Griffin writes.
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David Zipper @davidzipper.bsky.social · 24/09/2025
Portland, I'm coming your way! On Oct 10 I'll give a keynote at the PacTrans Transportation Conference, discussing ways that cities can future-proof themselves for self-driving cars. Info: pactransconference.com Thanks to @trecpdx.bsky.social for extending the invite.
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Greg GRIFFIN @gregpgriffin.bsky.social · 24/09/2025
“… when major government policies shift overnight, making long-term economic projections is quixotic at best. Still, some people do it for a living.” @jeffnyc.bsky.social in www.nytimes.com/2025/09/12/b...
nytimes.com
Believe in A.I.? Buy Beaten-Down Value Stocks.
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TREC at PSU @trecpdx.bsky.social · 18/09/2025
Last week, a plot of land in North Portland felt a shake—not one caused by an earthquake, but by a machine known as T-Rex. PSU researchers were simulating a minor quake. Hear from researchers Arash Khosravifar and Diane Moug of @maseehcollege.bsky.social on @opb.org: www.opb.org/article/2025...
opb.org
PSU researchers simulate earthquake to test soil-strengthening treatment
Researchers at Portland State University tested a soil treatment to fortify soil against liquefaction. We'll hear from two researchers to learn more.
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Taylor Griggs @taylorgriggs.bsky.social · 18/09/2025
Is this the first time in history a sitting Portland City Council member has corked an intersection during a bike ride? Cc: @councilorgreen.bsky.social A group rode/walked to City Hall today ahead of the council discussion on Vision Zero, led by @councilortkl.bsky.social.
Councilor Mitch Green standing with a Nike bike at an intersection
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Tara Goddard @drtaragoddard.com · 12/09/2025
Request: Do any of y'all use TransCAD in your work? If so, would you be willing to do a zoom talk in my class this term? I can't offer any real money, but I'll venmo you coffee money at least. 😏🙏
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Greg GRIFFIN @gregpgriffin.bsky.social · 03/09/2025
Urban planners and students concerned with the future should peruse the Effective Altruism discourse, which this Times piece (re)introduces. www.nytimes.com/2025/08/04/t...
nytimes.com
The Rise of Silicon Valley’s Techno-Religion
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Bikepedantic @pedantic.bike · 29/08/2025
Hive mind: Besides Bogota, and a few US university campuses, anyone know of any free bikeshare systems?
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Greg GRIFFIN @gregpgriffin.bsky.social · 29/08/2025
Urban planning faculty can integrate indigenous futurism in curriculum to help span thinking on time and who we plan with and for. www.underscore.news/culture/indi...
underscore.news
Indigenous Futurism Brings Fresh Perspectives to Pop Culture - Underscore Native News
Sadekaronhes Esquivel (any pronouns) is a Kanien’kehà:ka and Mexican Indigenous artist and writer. Esquivel utilizes illustration and gaming to create worlds and stories that promote imaginative futur...
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Greg GRIFFIN @gregpgriffin.bsky.social · 29/08/2025
Big data can both answer intractable questions, and further inequalities. Here’s how I’ve navigated the paradox of data for bicycle transport planning. gregpgriffin.myportfolio.com/how-not-to-l...
gregpgriffin.myportfolio.com
Greg P. Griffin - How Not to Lie with Big Data
Greg Griffin’s research analyzes how planners and publics work together with technology to improve transportation, civic engagement, and health. Currently, he is writing a book called Transport Truths...
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Kate Lowe (she/hers) @kateontransport.bsky.social · 28/08/2025
Have heard reasons to be skeptical of big consulting firms like McKinsey. Do any of you know much about SLALOM? Including work in public transit?
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Jennifer Dill, Ph.D. @jenniferdillpsu.bsky.social · 27/08/2025
Speaking of street transformations, the new restrictions motor vehicles on Pike Place outside the market made me enjoy the place far more then my visit in 2008. The pilot project was a window of opportunity (street repair work), a common origin for street transformations.(repost with gif)
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