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How well do cars do in crash tests they're not optimized for?

danluu.com

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Re: How well do cars do in crash tests they're not optimized for?

#31
Does anyone know of a way to objectively compare safety ratings between different eras of cars?

The standards for safety ratings change periodically, and great strides have been made in safety. I'm curious how much risk I'd remove by upgrading from a 2010 to a 2015 or 2018.

Driver death data [1] mentioned below may be the best source, just curious if there are any others.

Also, [2] is a really interesting crash test between a 1998 Corolla and a 2015 Auris (rebranded Corolla).

[1] https://www.iihs.org/ratings/driver-death-rates-by-make-and-...

[2] https://youtu.be/IVEjsvip8kc

Re: How well do cars do in crash tests they're not optimized for?

#32
post #11

Earlier quoted context omitted.

The most relevant research on car brands and models is probably the IIHS driver death rate data. It's not perfect since the populations are self selecting (cars aren't assigned to drivers at random) but within a particular vehicle class if you see a huge difference in death rates then that's probably meaningful. https://www.iihs.org/ratings/driver-death-rates-by-make-and-...

An interesting instance of the self-selection problem seems to show up if you select small 4-door 2017 cars. The Nissan Juke 2WD has a death rate of 12; the 4WD version of the same car has a death rate of 65. I have trouble believing that there's a significant difference in the cars themselves, so it seems likely that people who would buy a 2WD small SUV are a significantly different demographic than those who would…

I think it's more relevant how much each group drives. Everyone I know who drives a lot espouses how important 4WD/AWD is, whereas the people who barely drive at all aren't willing to pay so much more for it.

Re: How well do cars do in crash tests they're not optimized for?

#33

The whole car safety topic is very confusing. Car accidents is top1-top2 death reason in US for people in 20-40 age group [1]. Probably less in Europe but still one of the leading ones. I was thinking about how I can make myself safer. Which car brand/model is better? Which seat is better for passenger? How much riskier it is to drive during the night? In the rain? How dangerous is it to overtake on road with 1 lane…

This reminds me of the fact that my grandmother who recently passed away at 96 refused to make left turns. She stopped driving years ago, but before she did, my father would always help her find a way to get to the pharmacy, the grocery store, church, and family and friends houses making only right turns. Sometimes she went miles out of her way.

Your grandmother was onto something. UPS does the same thing:

https://www.businessinsider.com/ups-efficiency-secret-our-tr...

Re: How well do cars do in crash tests they're not optimized for?

#34

The whole car safety topic is very confusing. Car accidents is top1-top2 death reason in US for people in 20-40 age group [1]. Probably less in Europe but still one of the leading ones. I was thinking about how I can make myself safer. Which car brand/model is better? Which seat is better for passenger? How much riskier it is to drive during the night? In the rain? How dangerous is it to overtake on road with 1 lane…

Drive less.

Re: How well do cars do in crash tests they're not optimized for?

#35
post #27

The whole car safety topic is very confusing. Car accidents is top1-top2 death reason in US for people in 20-40 age group [1]. Probably less in Europe but still one of the leading ones. I was thinking about how I can make myself safer. Which car brand/model is better? Which seat is better for passenger? How much riskier it is to drive during the night? In the rain? How dangerous is it to overtake on road with 1 lane…

The way to make yourself safer is to move to one of the few American cities and towns with walking and transit-oriented development. Seriously! You'll spend a fewer hours in the car risking car accident death. A family can easily downsize to one car or less. You'll also spend more time getting light exercise by walking to the bus/train, walking to the store, walking for enjoyment. You'll also save from no longer buyi…

I think it's hard to generalize that living in Manhattan without a car is safer and healthier than living in, say, Vermont with one--especially if you rent cars for weekend and other vacations. Depends of course on location, lifestyle, commute, etc.

Re: How well do cars do in crash tests they're not optimized for?

#36

Earlier quoted context omitted.

This reminds me of the fact that my grandmother who recently passed away at 96 refused to make left turns. She stopped driving years ago, but before she did, my father would always help her find a way to get to the pharmacy, the grocery store, church, and family and friends houses making only right turns. Sometimes she went miles out of her way.

Your grandmother was onto something. UPS does the same thing: https://www.businessinsider.com/ups-efficiency-secret-our-tr...

Not really the same thing. UPS is optimizing the efficiency of a multi-stop route given that making a lot of unprotected left hand turns (especially with a truck) can add a fair bit of time to a route.

Re: How well do cars do in crash tests they're not optimized for?

#39

Earlier quoted context omitted.

This reminds me of the fact that my grandmother who recently passed away at 96 refused to make left turns. She stopped driving years ago, but before she did, my father would always help her find a way to get to the pharmacy, the grocery store, church, and family and friends houses making only right turns. Sometimes she went miles out of her way.

Your grandmother was onto something. UPS does the same thing: https://www.businessinsider.com/ups-efficiency-secret-our-tr...

Not at all. UPS does it to become more efficient, and that works because UPS has a lot of stops to make. But GP's grandmother did it to be safer even though it was usually less efficient.

Re: How well do cars do in crash tests they're not optimized for?

#40

Earlier quoted context omitted.

Drive the largest vehicle you can. When in a collision the momentum is converted to crushing force, you want to be in the less-crushable vehicle. Hey this may be an unpopular choice, but it is the one with the biggest safety impact! And that was the question.

Presumably downvoted because people don't like it. But it's the truth.

> A 2700lb subcompact vehicle that scores Good may fare worse than a 5000lb SUV that scores Acceptable. This is because the small overlap tests involve driving the vehicle into a fixed obstacle, as opposed to a reference vehicle or vehicle-like obstacle of a specific weight. This is, in some sense, equivalent to crashing the vehicle into a vehicle of the same weight, so it's as if the 2700lb subcompact was tested by running it into a 2700lb subcompact and the 5000lb SUV was tested by running it into another 5000 lb SUV.

Its the "truth" until you run into something that's bigger than you.

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