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David Levinson

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David Matthew Levinson is an American civil engineer and transportation analyst, a professor at the University of Sydney since 2017.… more

David Levinson
H-index: 72
Engineering 59%
Economics 27%
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by David Levinson — Reposted by: Rafael H. M. Pereira

transportist.net
Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.
Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.
Recently published: Abstract: We introduce Access Surplus as a welfare measure that frames accessibility in a market-like form: the inverse cumulative cost to reach the next opportunity is the ‘supply,’ and the willingness to pay for one more choice is the ‘demand.’ The area where demand exceeds supply, up to a natural stop point, is […]
dlvr.it
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Reposted by: David Levinson

transportist.mastodon.social.ap.brid.gy
Paying less for Public Transportation, Brookings study:

https://www.brookings.edu/wp-content/uploads/2025/09/Paying-Less-for-Public-Transit-Buses.pdf
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by David Levinson

transportist.net
Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.

Recently published: Levinson, David, and Isaac Mann (2025) “Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.” Findings, October. [doi] Abstract: We…
Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.
Recently published: Levinson, David, and Isaac Mann (2025) “Access Surplus: Valuing Accessibility by Integrating Opportunity Supply and Willingness to Pay.” Findings, October. [doi] Abstract: We introduce Access Surplus as a welfare measure that frames accessibility in a market-like form: the inverse cumulative cost to reach the next opportunity is the ‘supply,’ and the willingness to pay for one more choice is the ‘demand.’ The area where demand exceeds supply, up to a natural stop point, is Access Surplus . The metric avoids arbitrary cut-offs, is additive over residents, links clearly to project effects, and stays transparent when only origin–destination times and counts are available.
transportist.org

by David Levinson

transportist.net
Were urbanists in 1925 still complaining about the 1850s?

by David Levinson

transportist.net
All Scientific Knowledge is Heuristic – Science as Structured Approximation
All Scientific Knowledge is Heuristic – Science as Structured Approximation
Series index: A heuristic is a rule-of-thumb or disciplined shortcut that guides reasoning, decision-making, or discovery under uncertainty. By ignoring some variables to make others tractable, heuristics turn overwhelming complexity into workable problems. In science, this is not a drawback, it is the method itself (Box and Draper 1987). Models, measurements, and optimisations rely on […]
dlvr.it
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by David Levinson

transportist.net
All Scientific Knowledge is Heuristic – Science as Structured Approximation

Series index: On Writing with the Machine On Research with the Machine Towards a Theory of Theory Formation All Scientific Knowledge is Heuristic ← you are here A heuristic is a rule-of-thumb or disciplined shortcut that…
All Scientific Knowledge is Heuristic – Science as Structured Approximation
Series index: On Writing with the Machine On Research with the Machine Towards a Theory of Theory Formation All Scientific Knowledge is Heuristic ← you are here A heuristic is a rule-of-thumb or disciplined shortcut that guides reasoning, decision-making, or discovery under uncertainty. By ignoring some variables to make others tractable, heuristics turn overwhelming complexity into workable problems. In science, this is not a drawback, it is the method itself (Box and Draper 1987).
transportist.org

Reposted by: David Levinson

ryanlcooper.com
"A divided self-refereeing big-tent can exercise no real agency. It reacts. It must hope for and rely upon the other party's incompetence. Politics becomes a game played out between one clear protagonist and an inchoate cast of minor characters." drafts.interfluidity.com/2025/10/04/a...
A fertile corpse
drafts @ interfluidity
drafts.interfluidity.com
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by David Levinson

transportist.net
Your regular reminders that cars are weapons (multiple examples (to be proven) in article).
brendannyhan.bsky.social
Brendan Nyhan @brendannyhan.bsky.social · 3d

by Ahmed El-Geneidy — Reposted by: David Levinson

ahmedelgeneidy.bsky.social
Two fully funded PhD positions in Public transit planning and operations.
 
Interested candidates can find more information about the position, and complete an expression of interest form here: surveys.mcgill.ca/ls3/156813
Expression of Interest Form
surveys.mcgill.ca
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by David Levinson

transportist.net
David Levinson saved the planet in Independence Day, seems fair.

by David Levinson

transportist.net
Level of Service A!
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by David Levinson

transportist.net
This is the advantage of quote-posting vs. replies. Quote-posters bring to their own feed what they have to say, but not the original feed. Replies subject readers of the original poster to their opinion. My sense is many/most of the replies are from reply-farms or are bots, while QP are people.
adamserwer.bsky.social
Adam Serwer @adamserwer.bsky.social · 5d
Useful reminder here in some of the replies that people who share your politics are also capable of using them as a pretext to be awful to people and feel righteous about it bsky.app/profile/ocas...
ocasio-cortez.house.gov
Rep. Alexandria Ocasio-Cortez @ocasio-cortez.house.gov · 5d
I am sickened by today’s attack in Manchester. Antisemitism is on the rise around the world, and we must do all we can to stomp it out. I am grateful to first responders and congregants who showed incredible bravery, and I am praying for those who were killed.
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Reposted by: David Levinson, Scott A. Imberman

adamserwer.bsky.social
Useful reminder here in some of the replies that people who share your politics are also capable of using them as a pretext to be awful to people and feel righteous about it bsky.app/profile/ocas...
ocasio-cortez.house.gov
Rep. Alexandria Ocasio-Cortez @ocasio-cortez.house.gov · 5d
I am sickened by today’s attack in Manchester. Antisemitism is on the rise around the world, and we must do all we can to stomp it out. I am grateful to first responders and congregants who showed incredible bravery, and I am praying for those who were killed.
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by David Levinson

transportist.net
Your regular reminder that cars are weapons.
theguardian.com
The Guardian @theguardian.com · 5d
Manchester synagogue attack latest: police say suspect shot after four people injured by vehicle and stabbings
Manchester synagogue attack latest: police say suspect shot after four people injured by vehicle and stabbings
Police say they are responding to an incident in Crumpsall, Greater Manchester Greater Manchester Police said a suspect has been shot and four people have suffered injuries caused by a vehicle and stabbings at a synagogue in Crumpsall north of the city. The force said: Police were called to the Heaton Park Hebrew Congregation Synagogue, on Middleton Road, Crumpsall, at 9.31am by a member of the public, stating he had witnessed a car being driven towards members of the public, and one man had been stabbed. GMP declared PLATO and a major incident at 9.37am. Shots were fired by Greater Manchester Police firearms officers at 9.38am. One man has been shot, believed to be the offender. Continue reading...
www.theguardian.com
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Reposted by: David Levinson, Ben H. Ansell, Steve Peers , and 7 more

theguardian.com
Manchester synagogue attack latest: police say suspect shot after four people injured by vehicle and stabbings
Manchester synagogue attack latest: police say suspect shot after four people injured by vehicle and stabbings
Police say they are responding to an incident in Crumpsall, Greater Manchester Greater Manchester Police said a suspect has been shot and four people have suffered injuries caused by a vehicle and stabbings at a synagogue in Crumpsall north of the city. The force said: Police were called to the Heaton Park Hebrew Congregation Synagogue, on Middleton Road, Crumpsall, at 9.31am by a member of the public, stating he had witnessed a car being driven towards members of the public, and one man had been stabbed. GMP declared PLATO and a major incident at 9.37am. Shots were fired by Greater Manchester Police firearms officers at 9.38am. One man has been shot, believed to be the offender. Continue reading...
www.theguardian.com
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by David Levinson

transportist.net
ICYMI: Transportist: October 2025
Transportist: October 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. Posts Research News & Links Your Regular Reminder that Cars are Weapons Media New Sydney airport will be passenger-free for first 12 months Interview with Peter Jenkins: Is there a danger of Western Sydney International becoming […]
dlvr.it

by David Levinson

transportist.net
Transportist: October 2025
Transportist: October 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. Posts Research News & Links Your Regular Reminder that Cars are Weapons Media New Sydney airport will be passenger-free for first 12 months Interview with Peter Jenkins: Is there a danger of Western Sydney International becoming […]
dlvr.it

by David Levinson

transportist.net
Transportist: October 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. Posts Research News & Links US Accessibility Observatory reports Access is Down Green Lights could have shorter cycles in Sydney, but…
Transportist: October 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. Posts Research News & Links US Accessibility Observatory reports Access is Down Green Lights could have shorter cycles in Sydney, but the study was buried for no discernible reason…
transportist.org
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by David Levinson

transportist.net
If Sydney doesn’t have an entry into the NRL Grand Final, did it even happen?
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by David Levinson

transportist.net
cc @evanrobertsnz.bsky.social

by David Levinson

transportist.net
Transport flavoured snacks.
Highway Cake
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by David Levinson

transportist.net
The latest moral panic is that our children is learning too much … www.smh.com.au/national/nsw...
‘Children are up to two years ahead’: Calls to regulate billion-dollar private tutoring industry
At some Sydney schools more than half of students attend private academic tutoring, while coaching centres are running at least 500 maths, English and HSC tutoring classes each week.
www.smh.com.au
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Reposted by: David Levinson

siegman.biz
Liberating street design manuals and parking standards from behind their pay walls would be a step forward for road safety around the world. If everyone around the globe could see the standards that European countries have used to slash traffic fatalities, we’d all be better off.
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Reposted by: David Levinson, Evan Roberts

slothropsmap.bsky.social
Now this is Content
17 1K 3.3K

Reposted by: David Levinson

streets.mn
"Access to job opportunities by driving and transit declined between 2022 and 2023 in most large U.S. cities, but it improved by walking and biking, according to new research from CTS’s Accessibility Observatory (AO)."
For drivers and transit users, job access in nearly all major US cities is on the decline
A new report states that between 2022 and 2023, job access via car and transit declined across most large U.S. cities; walking and biking saw modest gains.
streets.mn
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by Carl T. Bergstrom — Reposted by: David Levinson

carlbergstrom.com
This, but first I make sure the classroom recording system named for Jeremy Bentham's dystopian surveillance prison is running smoothly.

bsky.app/profile/bell...
Noah Williams‬ ‪@bellmanequation.bsky.social‬ · 13m Routine for every class now: - sign out previous person who used the system - sign in to AV system computer - verify sign-in with authenticator on phone - wait for phone face ID to recognize - wait for AV system computer to load - kill Microsoft Teams auto-launch - sign in to course system web page September 25, 2025 at 1:10 PM 1 repost ‪ - verify sign-in with authenticator on phone - wait for phone face ID to recognize - navigate through course system to zoom - launch zoom for student still waiing on visa - wait for AV system projector warm up - sign in to Acrobat to open PDFs - verify sign-in with authenticator on phone ‪ - wait for phone face ID to recognize - open lecture slides - adjust in-room camera (if working, call AV if not) - lower projection screen - open slides - greet class - start lecture - raise screen to access whiteboard - mute camera projector - try multiple whiteboard makers to find one with ink
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by David Levinson

transportist.net
ICYMI: Proximity is the Enemy of Mobility (and Mobility is the Enemy of Proximity)
Proximity is the Enemy of Mobility (and Mobility is the Enemy of Proximity)
Proximity, how near things are to each other, doesn’t just substitute for mobility, how quickly we can move on the network across space, it undermines it. Higher density slows people and vehicles down. Narrower streets, more intersections, more stations, more people crossing all reduce speed. Mobility, in turn, undermines proximity. The faster and farther people […]
dlvr.it
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by David Levinson

transportist.net
What's everyone on about? This meme graphic says Sydney is only 14th in the world.
barchart.com
Barchart @barchart.com · 13d
Global Cities with the Highest Rent 🚨

Reposted by: David Levinson

barchart.com
Global Cities with the Highest Rent 🚨
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by David Levinson

transportist.net
This joke rings a bell.
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