What is the "Correct" Speed Limit?

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References & Further Reading

Confessions of a Recovering Engineer
Charles "Chuck" Marohn
https://www.confessions.engineer/

SWOV Fact sheet - The relation between speed and crashes
https://safety.fhwa.dot.gov/speedmgt/...

Rosén, E., Stigson, H. & Sander, U. (2011). Literature review of pedestrian fatality risk as a function of
car impact speed. In: Accident Analysis and Prevention, vol. 43, nr. 1, p. 25-33.
https://pubmed.ncbi.nlm.nih.gov/21094...

NACTO - Impact Speed and a Pedestrian’s Risk of Severe Injury or Death
https://nacto.org/wp-content/uploads/...

Nilsson, G. (1982). The effects of speed limits on traffic accidents in Sweden. In: Proceedings of the international symposium on the effects of speed limits on traffic accidents and transport energy use, 6-8 October 1981, Dublin. OECD, Paris, p. 1-8.

Kinetic energy management in road traffic injury prevention: a call for action
https://www.ncbi.nlm.nih.gov/pmc/arti...

Stopping Distance Calculator
https://www.omnicalculator.com/physic...

New crash tests show modest speed increases can have deadly consequences - IIHS News
   • New crash tests show modest speed inc...  

Speed and the Laws of Physics
Société de l'assurance automobile du Québec
https://web.archive.org/web/202211080...

Shaffer, D.M., Maynor, A.B. & Roy, W.L. The visual perception of lines on the road. Perception & Psychophysics 70, 1571–1580 (2008). https://doi.org/10.3758/PP.70.8.1571

Driver Reaction Time
Marc Green - Human Factors & Science
https://www.visualexpert.com/Resource...

The Effect of Driving Speed on Driver’s Visual Attention: Experimental Investigation
https://link.springer.com/chapter/10....

Zhang, W., & Peterson, M. (2011). Predicting Patterns of Potential Driver Distraction Through Analysis of Eye-Tracking Data.
http://onlinepubs.trb.org/onlinepubs/...

Why Speeding – Just a Bit – Can Be Dangerous
ARCON Forensic Engineers
https://arconforensics.com/system/cke...

Serious Injuries 2018 - European Road Safety Observatory
https://road-safety.transport.ec.euro...

Svenson, Ola (February 1981). "Are We All Less Risky and More Skillful Than Our Fellow Drivers?" (PDF). Acta Psychologica. 47 (2): 143–148. doi:10.1016/0001-6918(81)90005-6.

McCormick, I. A.; Walkey, F. H.; Green, D. E. (June 1986). "Comparative Perceptions of Driver Ability: A Confirmation and Expansion". Accident Analysis & Prevention. 18 (3): 205–208. doi:10.1016/0001-4575(86)90004-7. PMID 3730094.

E. Verheijen and J. Jabben, Effect of electric cars on traffic noise and safety,
RIVM report 680300009/2010, http://www.rivm.nl/bibliotheek/rappor...

Alexander RG, Macknik SL, Martinez-Conde S. Microsaccades in Applied Environments: Real-World Applications of Fixational Eye Movement Measurements. J Eye Mov Res. 2020 May 15;12(6):10.16910/jemr.12.6.15. doi: 10.16910/jemr.12.6.15. PMID: 33828760; PMCID: PMC7962687.

Slowing city traffic cut road deaths by a quarter
https://www.ed.ac.uk/news/2022/slowin...

Too Fast, Too Furious: New York City’s Speeding Epidemic
https://transalt.org/reports-list/too...

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Chapters

0:00 Intro
0:45 False Start NJB Logo
0:51 Real NJB Logo
0:56 Why 30km/h?
1:33 Noise
2:27 Kinetic Energy
3:33 Mass
4:24 Microcars
5:08 Walking & Cycling
6:15 Avoiding Crashes
7:36 Visual Perception
8:57 SMIDSY
9:29 Overconfidence
9:52 "That guy"
10:17 Mobility vs Safety
11:04 Faster and Slower
12:22 Too Much Traffic?
13:04 Brainerd Traffic Lights
14:47 Removing Traffic Lights
15:53 Painfully Inefficient Stroads
16:29 Building Great Streets
17:27 Fuel Efficiency
18:30 The Benefits
19:44 Conclusion & Assholes
20:17 Ground News

Corrections:
3:48 the car shown is a Ford Focus but the fact about the Fiesta is correct
10:42 this is the colloquial (not mathematical) definition of "inflection point", synonymous with "turning point" or "uptick"
17:32 lower speed limits actually results in better fuel efficiency in the city due to regular acceleration and braking, so it's even less of an issue