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Greg GRIFFIN

@gregpgriffin.bsky.social
1.4K followers 368 following 224 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 · 08/10/2026
Pretty sure we rely on water storage, which is kind of a battery🔋 Surely no natural action could harm dams, right? 😂
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Greg GRIFFIN @gregpgriffin.bsky.social · 23/09/2026
I see that the city couldn’t be bothered to provide a napkin sketch or standard diagram with proper spacing, so kudos to the contractor for saving more than half of the slab costs! It’s more frustrating when we see this crap in front of a big box store where a design team took the money.
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Greg GRIFFIN @gregpgriffin.bsky.social · 15/09/2026
To respond to formula-written inquiries, I had a formula email ready to copy-paste. It can be tougher to not respond when you know some of the inquiries are sincere, if misguided.
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Greg GRIFFIN @gregpgriffin.bsky.social · 11/09/2026
Notably, close to half took the sidewalk next to the unprotected bike lane. It’s a bit hostile out here for lovely Portland, but still better than many other cities.
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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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Greg GRIFFIN @gregpgriffin.bsky.social · 01/09/2026
The upside is that they’re learning in your class! Keep up the good work, Prof Rigolon.
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Greg GRIFFIN @gregpgriffin.bsky.social · 26/08/2026
By 4-way traffic, do you mean 1-way streets are better or reducing 🚗 volumes overall?
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Greg GRIFFIN @gregpgriffin.bsky.social · 26/08/2026
Public transit is the original MaaS.
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Reposted by Greg GRIFFIN
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 · 30/07/2026
Absolutely! They’re the best stops on road trip$.
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Greg GRIFFIN @gregpgriffin.bsky.social · 30/07/2026
Fantastic news, @grantdmckenzie.bsky.social and team! Looking forward to learning from these studies.
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Greg GRIFFIN @gregpgriffin.bsky.social · 17/07/2026
@pkoonce.bsky.social is a Chancellor of multimodal transportation design, as far as I’m concerned.
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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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Reposted by Greg GRIFFIN
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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Greg GRIFFIN @gregpgriffin.bsky.social · 01/07/2026
Streaming!
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Reposted by Greg GRIFFIN
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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Reposted by Greg GRIFFIN
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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Greg GRIFFIN @gregpgriffin.bsky.social · 12/06/2026
I have done this too, but took no selfies. Several ‘congratulations’ from cars reminded me that all regalia looks the same to most folks, and that they wouldn’t imagine a professor might bike to graduation in San Antonio 🎓
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Reposted by Greg GRIFFIN
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 · 27/05/2026
Thanks for the boost. Former San Antonio residents here on pins and needles. #GoSpursGo
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Greg GRIFFIN @gregpgriffin.bsky.social · 27/05/2026
I’m guessing this is a newer condo? Oregon Measure 50 created funny dynamics, with older homes assessed lower than valued. In Oregon, rent new, buy old.
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Greg GRIFFIN @gregpgriffin.bsky.social · 17/05/2026
“The issue, Lewis Mumford might have framed, could be of authoritarian and democratic technics—whether the technology contributes more to top-down control or bottom-up understanding” (repositories.lib.utexas.edu/items/d61103...).
repositories.lib.utexas.edu
Sociotechnical co-production of planning information : opportunities and limits of crowdsourcing for the geography and planning of bicycle transportation
Urban planners deploy civic technologies to engage publics with digital tools in a relative vacuum of theory, understanding of challenges, or benefits. The issue, Lewis Mumford might have framed, cou...
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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 · 06/05/2026
It also punctures the New Urbanist claim that federal environmental regulation has mitigated need for zoning land use, as opposed to form. A neo-gothic data center perfectly positioned in the NU Transect destroys communities the same.
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Greg GRIFFIN @gregpgriffin.bsky.social · 05/05/2026
Transit is count of buses, not people, so real % of travelers is different.
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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 · 25/03/2026
Short-form outlets reduce space for LLMshit, so I think @findingspress.org is ahead of the curve, albeit not immune.
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Greg GRIFFIN @gregpgriffin.bsky.social · 24/03/2026
Envisioning a profligacy of American sidewalk construction 🚧
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Reposted by Greg GRIFFIN
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 · 13/01/2026
Municipal bonds seem generally compatible with an urbanist ethos. We just have to not check up on the cities’ use of them for funding arterial expansions or utilities for sprawl :-)
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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 · 25/12/2025
👆we miss from our Texas years. We do get to forage from the forest in Oregon, tho (Yellowfoot pictured)
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Greg GRIFFIN @gregpgriffin.bsky.social · 22/12/2025
It's not fair that epistemology isn't on the 'menu' for almost everyone. Motion to create a high school curriculum that could be taught by the librarian on the limits and advancement of what we think we know.
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Greg GRIFFIN @gregpgriffin.bsky.social · 22/12/2025
Update: logged in again and it worked. Maybe a programmed urgency test?
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Greg GRIFFIN @gregpgriffin.bsky.social · 22/12/2025
actually, maybe they don't want me to finish it after all
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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 · 13/12/2025
I wasn’t here when I-205 was planned 1 mile to the east, serving the same corridor, but that probably had something to do with comfort changing 82nd to the city’s system. Highway richness was achieved.
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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 · 26/11/2025
That’s what most of her peers did (www.dhs.gov/leadership).
dhs.gov
Leadership | Homeland Security
List of senior leaders at the Department of Homeland Security (DHS), their position, and biography – including the current Secretary.
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Greg GRIFFIN @gregpgriffin.bsky.social · 26/11/2025
OMG, I had to look this up to confirm it’s true. I don’t know anything about her, but suggest humbly that this promotion is well deserved after what her parents have put her through.
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