David M Levinson ⁂
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David M Levinson ⁂
@transportist.org

https://www.transportist.org

@transportist@mastodon.social‬
@transportist.mastodon.social.ap.brid.gy

Trnsprtst. Rogue Planner. Refreshingly Unromantic. So F*ing Lucid. fRSN. 2%.

Research: #Access, #TransportEconomics, #NetworkEvolution, #Traffic. .. more

David Matthew Levinson is an American civil engineer and transportation analyst, a professor at the University of Sydney since 2017. He formerly held the RP Braun/CTS Chair in Transportation at the University of Minnesota, from 2006 to 2016. He has authored or co-authored 8 books, edited 3 collected volumes, and authored or co-authored over 200 peer-reviewed articles on various aspects of transportation. His most widely cited works are on transportation accessibility and on the travel time budget. He has developed models of the co-evolution of transport and land use systems, demonstrating mutual causality empirically. He is a founder of the World Society for Transport and Land Use Research. In 1995 he was awarded the Charles Tiebout Prize in Regional Science by the Western Regional Science Association, and in 2004, the CUTC-ARTBA New Faculty Award. His travel behaviour research was featured in the book Traffic by Tom Vanderbilt. .. more

Engineering 59%
Economics 27%
Pinned
A new starter pack: go.bsky.app/LaeKYA2 . Let me know who else belongs in the comments.

So you are saying Paracock? Er SkyShowtime?

Who will win the FIFA Prizes in: Economics, Literature, Physics, Chemistry, and Physiology? Right answers only?

If Siri is so smart, why is my email response to prospective students not defaulted to “I am not taking new students at this time.“ ? I must type this twice a day now.

Reposted by David Levinson

Transportist: December 2025

Welcome to the latest issue of The Transportist, especially to our new readers. As always you can follow me on Mastodon, BlueSky, or RSS. If you read all the way to the bottom, you will find some roundabout lessons about traffic engineering and public transport in this…
Transportist: December 2025
Welcome to the latest issue of The Transportist, especially to our new readers. As always you can follow me on Mastodon, BlueSky, or RSS. If you read all the way to the bottom, you will find some roundabout lessons about traffic engineering and public transport in this month's newsletter. Posts Media Radio Interview: 2SER: Sydney Takes the Crown for Longest Commute Time in Australia…
transportist.org

The guy (Sheb Wooley) who did the Wilhelm Scream: en.wikipedia.org/wiki/Wilhelm...

How many of those papers were written by AI?

It’s already Friday.

A consulting firm with an NDA asked me (paid) about elevators that go vertical AND horizontal for an unnamed project. I said people should get out and walk between vertical and horizontal transport modes, something that complex was likely to break and be inefficient.

I’d think if they want higher across-the-board salaries (COLA) for their actual members they would renegotiate and give up fictional future union members. Obviously no reason for them to say that now.

But surely the contract expires multiple times before this line opens.

Reposted by David Levinson

WAYMO is HERE KINDA: You'll see driverless cars in Minneapolis today operated by drivers. They're mapping, road testing and making a plea to lawmakers to allow autonomous vehicles to pick up passengers with no one at the wheel. Someday soon, Minneapolis and then... www.twincities.com/2025/11/20/w...
Waymo rolls driverless ridesharing into Minneapolis for testing
The driverless rideshare company operates in five markets and is rolling into five more,
www.twincities.com

On Density and Synchrony (Scheduling Density)

Temporal coordination is about timing. Work and school schedules, transport services, parking, and energy use can be staggered or load balanced to avoid overload at any one moment. Tools include flexible work hours, congestion pricing, and off-peak…
On Density and Synchrony (Scheduling Density)
Temporal coordination is about timing. Work and school schedules, transport services, parking, and energy use can be staggered or load balanced to avoid overload at any one moment. Tools include flexible work hours, congestion pricing, and off-peak utility tariffs. Some activities require synchrony, such as assembly lines or collaborative office work. Spatial coordination is about location. Co-location means more people in one place, i.e.
transportist.org

Reposted by David Levinson

"Negotiations between the Council of Australasian University Librarians and academic publishing giant Elsevier have broken down"
www.rnz.co.nz/news/nationa...
Universities in 'battle of the century' with journal publisher Elsevier
One New Zealand university told its staff all universities in New Zealand and Australia would "lose some degree of access" to the publisher's 1600 titles from the start of next year.
www.rnz.co.nz

Reposted by David Levinson

OpenAI has developed a new way to train small AI models with internal mechanisms that are easier for humans.

Blog: Understanding neural networks through sparse circuits
( openai.com/index/unders... )
Paper: Weight-sparse transformers have interpretable circuits ( cdn.openai.com/pdf/41df8f28... )
Understanding neural networks through sparse circuits
We trained models to think in simpler, more traceable steps—so we can better understand how they work.
openai.com

Reposted by David Levinson

It's not an Apple 2, it's a Wombat!

Apple's lawsuit against the company that sold this machine ended up going all the way to the High Court.

And Apple lost!

Turns out software was not covered by Australian copyright law at the time […]

[Original post on pixelfed.social]

It's the kind of change a Democrat could never make. [terrible pun]. But now, more seriously, how will we pay tolls in Illinois?

Reposted by David Levinson

Fun for all road tolling advocates!

(And yes, I suspect that from a wildlife perspective this is probably not ideal.)

www.bbc.com/reel/video/p... #dktrp
Raja the elephant asking for a road toll
In Sri Lanka, a charming elephant cheekily halts traffic for treats.
www.bbc.com

ICYMI: How will robots get to work?
How will robots get to work?
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