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David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 1d

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 […]

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 2d

All Scientific Knowledge is Heuristic – Science as Structured Approximation https://transportist.org/2025/10/07/all-scientific-knowledge-is-heuristic-science-as-structured-approximation/?utm_source=dlvr.it&utm_medium=mastodon

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David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 2d

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 […]

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 7d

ICYMI: Transportist: October 2025 https://transportist.org/2025/09/30/transportist-october-2025/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 9d

Transportist: October 2025 https://transportist.org/2025/09/30/transportist-october-2025/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 9d

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 […]

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 13d

ICYMI: Proximity is the Enemy of Mobility (and Mobility is the Enemy of Proximity) https://transportist.org/2025/09/24/proximity-is-the-enemy-of-mobility-and-mobility-is-the-enemy-of-proximity/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 15d

Proximity is the Enemy of Mobility (and Mobility is the Enemy of Proximity) https://transportist.org/2025/09/24/proximity-is-the-enemy-of-mobility-and-mobility-is-the-enemy-of-proximity/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 15d

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 […]

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 18d

ICYMI: Scenes of BikeSharing in Sydney https://transportist.org/2025/09/19/scenes-of-bikesharing-in-sydney/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 20d

How has no one created the "Fediverse Reserve"? We could fund the whole thing with Fedecoin.

#fediverse

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 20d

Scenes of BikeSharing in Sydney https://transportist.org/2025/09/19/scenes-of-bikesharing-in-sydney/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 20d

Scenes of BikeSharing in Sydney

People parking shared bikes in Sydney, both individual riders, and the organisations (Lime, HelloRide, and Ario) don't generally seem to care about people walking, and will just inconvenience pedestrians to store their bike on the footpath. Often where it is […]

The FDA Is Urging Shoppers to Throw Away These Lead-Leaching Cookware Products Immediately

Reposted by David M. Levinson ⁂

David M Levinson ⁂ @transportist.net · 20d

This explains soooo much … www.foodandwine.com/fda-warning-...

On August 13, the FDA initially issued a warning about cookware that can leach lead into food during everyday use. By early September, the agency expanded that alert to include additional aluminum-bas...

www.foodandwine.com

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 22d

ICYMI: On Leaked Plans for Trains in Sydney https://transportist.org/2025/09/15/on-leaked-plans-for-trains-in-sydney/?utm_source=dlvr.it&utm_medium=mastodon

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David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 24d

On Leaked Plans for Trains in Sydney https://transportist.org/2025/09/15/on-leaked-plans-for-trains-in-sydney/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 24d

On Leaked Plans for Trains in Sydney

The figure below shows plans (slightly better than the Crayon doodlings we all do) published by the Sydney Morning Herald (apparently obtained from YouTube channel TrainGuy4 -- watch the video for in-depth detailing about the operational changes including […]

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 25d

ICYMI: Safety as Access https://transportist.org/2025/09/12/safety-as-access/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 27d

Safety as Access https://transportist.org/2025/09/12/safety-as-access/?utm_source=dlvr.it&utm_medium=mastodon

David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 27d

Safety as Access

Recently published: Levinson, David (2025) “Safety as Access.” Findings, September. [doi] This paper extends the General Theory of Access by explicitly accounting for safety. Using a capability approach, we show how crash probability and severity systematically reduce lifecycle […]

Safety as Access | Published in Findings

Reposted by David M. Levinson ⁂

Findings Press @findingspress.fediscience.org.ap.brid.gy · 27d

Safety as Access https://findingspress.org/article/144038-safety-as-access

By David Levinson. This paper shows how crash risk cuts lifecycle accessibility, integrates safety into access metrics, monetises gains with hedonic prices, and supports access-based appraisal.

findingspress.org

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David M. Levinson ⁂ @transportist.mastodon.social.ap.brid.gy · 29d

ICYMI: Access Ecology vs Media Ecology https://transportist.org/2025/09/08/access-ecology-vs-media-ecology/?utm_source=dlvr.it&utm_medium=mastodon