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How Road Barriers Stopped Injuring Drivers

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Channel: Andrew Lam
Categories: Science   |   Technology  
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We've gotten way better at engineering and designing road barriers — often in surprising ways — to dramatically reduce driving deaths.

To understand crash costs better, NPR has a great podcast on how life is valued: https://www.npr.org/2020/04/15/835571843/episode-991-lives-vs-the-economy

If you enjoyed this video, considering supporting the channel with a donation so I can produce more of these videos:
https://www.buymeacoffee.com/andrewlam
Bitcoin: 16jkM2UvmDD5PndCtbmV5UhMSfXYsLHFDj
Etherium: 0xCB8BAE66BA9421C0DB219f77c6B3D1DCf6C5DE89

Before I only created reviews of dash cams which are security cameras for vehicles. They help prevent scams and make it easy to get your money back from insurance or other drivers if you're not at fault. See my video here: https://youtu.be/d-KBKzkOKS0

Now, it's my goal to delve deeper into how businesses and governments choose and use products - something few other channels cover.

It took a full month to research this video mostly using primary sources. Here are some of the most important sources I've used:
NDDOT - Guardrail Training and Information: https://www.dot.nd.gov/divisions/maintenance/guardrail/
WDOT Cable Barriers: https://www.wsdot.wa.gov/research/reports/fullreports/812.1.pdf
FDOT - Guardrail – How it Works: https://youtu.be/iUjlD24945c
Alberta Roadside Design Guide: https://www.alberta.ca/roadside-design-guide-table-of-contents.aspx
NHTSA Fatality Causes: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/812927
Midwest Roadside Safety Facility: https://mwrsf.unl.edu/ for their excellent videos on crash tests they've done
FHWA Crash Costs for Highway Safety Analysis: https://trid.trb.org/view/1539891
Texas A&M Transporation Institute's Videos: https://www.youtube.com/user/ttitamu
A comparison of freeway median crash frequency, severity, and barrier
strike outcomes by median barrier type https://pubmed.ncbi.nlm.nih.gov/29715626/

Timeline
0:00 Driving deaths are WAY less
1:01 How barrier are rated for safety
2:37 When barriers are used or avoided
3:19 Concrete barrier engineering
4:37 Guardrail engineering
5:44 The surprising engineering connecting a concrete barrier & guardrail
6:08 Cable Barriers - All about em
6:42 Cable Barrier Controversy
8:23 Barrier Terminals - How old barriers slice you up
9:26 Newer energy absorbing terminals & how they protect you
11:00 Crash cushions - big boy units for concrete & other structures
13:16 How the government figures out how much your life and limbs are worth
13:55 What if saving your life isn't "worth it"?

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