Relevance of IIHS crashworthiness ratings

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The discussion centers on the importance of IIHS crashworthiness ratings in vehicle safety decisions. Participants express a strong preference for upgrading to newer models with better safety features, such as side airbags, especially after experiencing or witnessing serious accidents. The conversation highlights the limitations of older vehicles in crash tests, particularly regarding side impact protection. Many contributors emphasize that modern safety systems significantly reduce injury risk in collisions, advocating for vehicles with high IIHS ratings. Overall, the consensus is that safety ratings are crucial in making informed car purchase decisions.
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https://www.iihs.org/ratings
Do you believe in all of these automobile crushworthiness ratings and does it affect your decision?

I have an old car that doesn't score good in the crushworthiness tests. I wonder whether I should upgrade to a new model. Did you upgrade yours based on the ratings?
 
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Yes, I would upgrade. How old is your car? Adding side airbags is a big improvement, IMO. When we bought my daughter a car about 5-6 years ago, the IIHS rating was near the top of the list for deciding which model to get.

And here is a picture of a head-on crash from last Sunday night where my 12 year old granddaughter was riding in the car, coming back from a weekened with her friends. Everybody in their car survived with only moderate injuries (the person who caused the crash in the other vehicle was not wearing a seatbelt, and was ejected and killed). Do you think the safety rating of this car was important?

1569333848012.png
 
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OMG! Thank goodness those kids were ok. That’s as graphic a demonstration as you can get.

I also put crash ratings at the top of the list when choosing a car. There are now tests for side impact and offset frontal crashes that didn’t exist for old cars and that have spurred the auto industry to make a lot of safety improvements. I also would vote for an upgrade.
 
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berkeman said:
Yes, I would upgrade. How old is your car? Adding side airbags is a big improvement, IMO. When we bought my daughter a car about 5-6 years ago, the IIHS rating was near the top of the list for deciding which model to get.

And here is a picture of a head-on crash from last Sunday night where my 12 year old granddaughter was riding in the car, coming back from a weekened with her friends. Everybody in their car survived with only moderate injuries (the person who caused the crash in the other vehicle was not wearing a seatbelt, and was ejected and killed). Do you think the safety rating of this car was important?

My car is 15 years old. Only two front airbags for entire car. Driver wheel and passenger front only. No side air bags or knees air bags. It has very poor small overlap front driver side crush scores. But I love to use old car because it's safer from car jackers or car nappers. They mostly rob expensive new cars which I'm nervous using. Also by driving carefully. One can avoid that kind of accident, is it not? Hope your 12 year old granddaughter ok.
 
new6ton said:
Also by driving carefully. One can avoid that kind of accident, is it not?
You can certainly lower the chance of a crash by driving carefully and defensively, but accidents still happen. In this crash on Sunday night, a driver was getting ready to make an illegal left turn across the path of the family's car, but was waiting for the cars to pass first. Unfortunately, he got rear-ended by an 18-wheeler big rig truck, which pushed him unexpectedly into oncoming traffic.
new6ton said:
Hope your 12 year old granddaughter ok.
Thank you. She has some broken bones and a concussion, but should recover physically in a couple months. Unfortunately, her friend also saw the dead man's body, so I've recommended that both girls go through some counselling. Healing their mental side may take longer than a couple months.
 
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berkeman said:
You can certainly lower the chance of a crash by driving carefully and defensively, but accidents still happen. In this crash on Sunday night, a driver was getting ready to make an illegal left turn across the path of the family's car, but was waiting for the cars to pass first. Unfortunately, he got rear-ended by an 18-wheeler big rig truck, which pushed him unexpectedly into oncoming traffic.

Thank you. She has some broken bones and a concussion, but should recover physically in a couple months. Unfortunately, her friend also saw the dead man's body, so I've recommended that both girls go through some counselling. Healing their mental side may take longer than a couple months.

If the 18-wheeler big rig truck pushed the other party car at stop. How come the person was ejected outside in the windshield when the speed was low?

Most cars are designed to survived moderate overlap frontal tests where the collision is distributed towards the entire front versus just the side (so called small overlap front tests).

https://www.iihs.org/ratings/about-our-tests#frontal-crash-tests
How many owners here have excellent score in the small overlap frontal tests?

My parents car have 7 airbags.

srs.jpg


My car only has 2 airbags in the front.

I'd like to know how many percentage of owners here have actually the curtain and side airbags too? Let's make a survey.
 
A survey is irrelevant if you simply don’t want to buy a new car. And it’s not our place to try to convince you.
 
new6ton said:
If the 18-wheeler big rig truck pushed the other party car at stop. How come the person was ejected outside in the windshield when the speed was low?
I don't have the full story yet, but the car my granddaughter was traveling in was going at freeway speed when the impact happened...

marcusl said:
A survey is irrelevant if you simply don’t want to buy a new car. And it’s not our place to try to convince you.
And you don't need to buy a flashy new car if you want to upgrade your safety systems to 7 airbags, etc. The car that we bought for our daughter (like I said, maybe 5-6-7 years ago?) was a Honda CRV. At the time, it was one of the few cars/models with side airbags, and IIRC, it had a very good IIHS safety rating. Maybe look at used cars with full airbag protection and good safety ratings, and low "flash factor". I'm pretty sure you can find a good used car with much better protection than what you are driving now.

BTW, my daughter really wanted an old pickup truck instead (old Ford F150 with lap belts only), but at least she was reasonable enough to agree to a more modern version with way better safety systems and design. :smile:
 
BTW, I don't think I've mentioned it in this thread yet, but many of the PF regulars know that I work part-time in EMS in addition to my full-time EE R&D job. I've been on-scene at numerous motor vehicle accidents where I am just amazed that the folks involved have been able to basically walk away with only minor injuries with crashes as severe as the picture I posted.

Modern car safety systems and crush zone design have saved countless lives. Most (not all) of the serious injuries I've seen have been due to older vehicles without those systems (or people who bypass the safety systems by not wearing their seatbelts like the guy who died on Sunday). For sure any vehicle that I purchase will have every safety feature that I can get (well, except for the self-driving thing...).
 
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  • #10
berkeman said:
I don't have the full story yet, but the car my granddaughter was traveling in was going at freeway speed when the impact happened...And you don't need to buy a flashy new car if you want to upgrade your safety systems to 7 airbags, etc. The car that we bought for our daughter (like I said, maybe 5-6-7 years ago?) was a Honda CRV. At the time, it was one of the few cars/models with side airbags, and IIRC, it had a very good IIHS safety rating. Maybe look at used cars with full airbag protection and good safety ratings, and low "flash factor". I'm pretty sure you can find a good used car with much better protection than what you are driving now.

BTW, my daughter really wanted an old pickup truck instead (old Ford F150 with lap belts only), but at least she was reasonable enough to agree to a more modern version with way better safety systems and design. :smile:

My car is Honda CRV 2004 model. Here is the IIHS rating.

https://www.iihs.org/ratings/vehicle/honda/cr-v/2004
At that time there was no small overlap front tests done yet. It's only done in the CRV 2012 model and onwards. It has Marginal score in the 2012 to 2015. This means the models prior has marginal scores too.

small front overlap.JPG


It's only beginning in 2016 model where it has Good score. This means both your daughter (perhaps 2013 model) and my car (2004 model) has similar performance in the small overlap front: driver-side test where lower leg/foot is marginal. Any ideas what to do about it?
 
  • #11
What year did they add the side impact airbags? That was one feature that I was looking for explicitly. The T-bone collision is one of the worst types that I've had to deal with...
 
  • #12
berkeman said:
What year did they add the side impact airbags? That was one feature that I was looking for explicitly. The T-bone collision is one of the worst types that I've had to deal with...

They added it in the 2005 model. Mine has no side impact airbags. Side impact bag is really very important? Are there studies about performance of cars with it and without it in side collisions? What is meant by T-bone collision?
 
  • #13
A T-bone collision is when one car crashes into the side of another car, especially hitting the side doors directly. Older cars have little protection against this type of collision, and that exposes the driver or passenger to a very sharp side impact. In addition to breaking the hips and ribs, it usually causes a very severe head impact on the window, which often leads to a fatal brain injury. Not good.

IMO, the higher the IIHS rating the better (and hopefully you can find an appropriate brand/model of car which won't be too much of a target), but side impact airbags are now a requirement for me in any vehicle purchases. T-bone collisions are the worst that I see now in terms of injuries, when there is no side airbag protection.
 
  • #15
berkeman said:
A T-bone collision is when one car crashes into the side of another car, especially hitting the side doors directly. Older cars have little protection against this type of collision, and that exposes the driver or passenger to a very sharp side impact. In addition to breaking the hips and ribs, it usually causes a very severe head impact on the window, which often leads to a fatal brain injury. Not good.

IMO, the higher the IIHS rating the better (and hopefully you can find an appropriate brand/model of car which won't be too much of a target), but side impact airbags are now a requirement for me in any vehicle purchases. T-bone collisions are the worst that I see now in terms of injuries, when there is no side airbag protection.

Actually my parents no longer use their Toyota 7-airbag car because they are 85 years old and they let me use it. But I don't use it yet because I still have the CRV. If I will give the latter to my sibling or retain it as second car in case the other is being used. Is there a way to add side airbag add on to cars without it?
 
  • #16
berkeman said:
A T-bone collision is when one car crashes into the side of another car, especially hitting the side doors directly. Older cars have little protection against this type of collision, and that exposes the driver or passenger to a very sharp side impact. In addition to breaking the hips and ribs, it usually causes a very severe head impact on the window, which often leads to a fatal brain injury. Not good.

IMO, the higher the IIHS rating the better (and hopefully you can find an appropriate brand/model of car which won't be too much of a target), but side impact airbags are now a requirement for me in any vehicle purchases. T-bone collisions are the worst that I see now in terms of injuries, when there is no side airbag protection.

This is the side airbag of my parent new car with 7 airbags (we live in same house so I can use it since they don't use it anymore).

driver side airbag.jpg
The small black label with texts at the side says "SRS Airbag". Do you think it can deploy with all the fabric and sews enclosing it?
 
  • #17
Also this is the typical 7 airbags in new car (the 7th one is in the knee). Note the side air bag is small and just protect the torso and pelvis. I think the most important is the curtain airbags, right? For cars without it. Won't it be possible to add curtain airbags?

new car.png
If there is no way I can add the side curtain airbags to existing old CRV. I have no choice but to get rid of it and buy a cheaper car with curtain airbag as backup to my parent car. We need a 2nd car other family members need to use them. What is the cheapest car with reliable curtain air bags now?
 
  • #18
new6ton said:
I think the most important is the curtain airbags, right? For cars without it. Won't it be possible to add curtain airbags?
It looks like the "curtain" aibags are the ones that protect the occupants' heads in side collisions, so yes, that is an important feature IMO. It's not possible in general to retrofit older cars with new airbags, although you often can upgrade the seatbelt systems (for car racing, for example).

https://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/side-curtain-airbag.htm
1569374319190.png
 
  • #19
new6ton said:
This is the side airbag of my parent new car with 7 airbags (we live in same house so I can use it since they don't use it anymore).

View attachment 250150The small black label with texts at the side says "SRS Airbag". Do you think it can deploy with all the fabric and sews enclosing it?

To those with lower side airbags that protect the torso and pelvis. Try to see if your seat cover is like this with cover? Can it really deployed with the cover on? Or do you remove all coverings for sure deployment?

driver side airbag.jpg


For the curtain airbags of my parents car. It's located in the upper frame and no covers so no problems.

curtain airbags.jpg


I asked my friends. Most of them don't even have curtain airbags in the cars. So I am wondering how many of you in PF really have it (or don't). Don't worry. We won't force you to upgrade the car. Just wondering, that's all.
 
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  • #20
new6ton said:
Or do you remove all coverings for sure deployment?
No, please don't try to tamper with any of the airbag systems. That could end badly several different ways...
 
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  • #21
new6ton said:
This is the side airbag of my parent new car with 7 airbags...The small black label with texts at the side says "SRS Airbag". Do you think it can deploy with all the fabric and sews enclosing it?
Yes. Have you ever seen an airbag deploy? It won’t even notice that bit of fabric and stitching.
 
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  • #22
I erroneously posted the reply to Cobol but let me type this again.

I asked most of my friends. They don't have curtain airbags even when their car model is 2015 to 2019. I think I know why.

In the Fort Ecosport SUV. All models in the US have curtain airbags. But outside the US. The Fort Ecosport has variants called Ecosport Trend and Ecosport Titanium. Only the latter has curtain airbags. The former doesn't have it.

https://www.carwale.com/ford-cars/ecosport/trend15ltdci/
Besides the US. What countries have curtain airbag as mandatory? For those countries not mandatory. Curtain airbag is only included in top variant which not many buys because it is more expensive.

For those living outside the US (or even within the US for comparison). How many of your friends and relatives have curtain airbags? In my case. 90% or more have no curtain airbags.
 
  • #23
berkeman said:
In this crash on Sunday night, a driver was getting ready to make an illegal left turn across the path of the family's car, but was waiting for the cars to pass first. Unfortunately, he got rear-ended by an 18-wheeler big rig truck, which pushed him unexpectedly into oncoming traffic.
Someone (also an EMT) once told me that you should not turn the wheel left while you’re waiting in anticipation of your turn, because a rear impact can shove you into the oncoming traffic. That sounded sensible to me at the time and this thread has just turned “sounded sensible” into “never ever going to get impatient that way again”.
 
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  • #24
This thread has convinced me to sell my CRV and use my parents 7-airbag Toyota which they never use anymore. I avoided the latter because I feel more comfortable with cheap car but realized the Toyota is getting older and getting cheaper too.

Now I am curtain airbag aware.

But our family needs extra 2nd car. So after I sell my CRV. I'll get another one with curtain airbags. I'm looking for one with the toughest cage able to for example survived being fallen by a container.

container collapse 1.JPG




Is there any existing SUV that can survive fall from a container? Or should I need military milspec vehicle? And what military vehicle can survive it (just to know how the cage is designed)?
 
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  • #26
OCR said:

Car cage with 40% boron alloy used in Abloy padlock may be very strong. See:



But can it survive a container drop?

Also to make car absorb collision energy. It should not be rigid. So how do you draw the line between the cage so rigid to survive container fall and flexible enough to absorb collision energy? Who are car mechanical experts here?
 
  • #27
new6ton said:
https://www.iihs.org/ratings
Do you believe in all of these automobile crushworthiness ratings and does it affect your decision?

I have an old car that doesn't score good in the crushworthiness tests. I wonder whether I should upgrade to a new model. Did you upgrade yours based on the ratings?
Yes, I upgraded in part because I saw deficiencies in my driving that I knew technology could overcome. But I didn't choose a car specifically for the rating (or even look at the rating), I looked at the technology.

My previous car was a 2012 with good survivability, but nothing in the way of collision avoidance.
 
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  • #28
new6ton said:
Is there any existing SUV that can survive fall from a container?
Hopefully that doesn't happen very often where you live...

Your best option is probably to talk with a race car shop to see what kinds of vehicles they can build roll cages in. They are routinely installed in vehicles that folks take to racetracks for track days and club racing. I've seen them installed inside BMWs and Subarus, for example. They aren't cheap, and take up a fair bit of room inside the vehicle, but definitely make the car a lot stronger for rollovers (and container impacts, I guess)...

1569506300812.png
 
  • #29
Nugatory said:
Someone (also an EMT) once told me that you should not turn the wheel left while you’re waiting in anticipation of your turn, because a rear impact can shove you into the oncoming traffic. That sounded sensible to me at the time and this thread has just turned “sounded sensible” into “never ever going to get impatient that way again”.
I have a turn like that on a road I frequent and it scares the hell out of me. I do often avoid it for that reason, but that's a good tip. Still, I would think an oblique (right rear) impact could still force me far enough over the line.
 
  • #30
No matter how strong your car, there's always a more massive object. Where you stop is a matter of personal choice, and perhaps the size of your wallet.

1569509454281.png
 
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  • #31
anorlunda said:
there's always a more massive object
Where'd dat thing come from?!
 
  • #32
berkeman said:
I don't have the full story yet, but the car my granddaughter was traveling in was going at freeway speed when the impact happened...

When you have the full story. Try to share us how exactly the driver got ejected through the windshield when he was waiting for turn.

I always do this every day when I wait for left or right U turn without stop light. And if a big vehicle rear end me. I could go into the path of the oncoming traffic.

And you don't need to buy a flashy new car if you want to upgrade your safety systems to 7 airbags, etc. The car that we bought for our daughter (like I said, maybe 5-6-7 years ago?) was a Honda CRV. At the time, it was one of the few cars/models with side airbags, and IIRC, it had a very good IIHS safety rating. Maybe look at used cars with full airbag protection and good safety ratings, and low "flash factor". I'm pretty sure you can find a good used car with much better protection than what you are driving now.

BTW, my daughter really wanted an old pickup truck instead (old Ford F150 with lap belts only), but at least she was reasonable enough to agree to a more modern version with way better safety systems and design. :smile:
 
  • #33
berkeman said:
Your best option is probably to talk with a race car shop to see what kinds of vehicles they can build roll cages in.
They can, and will. . . Build one for anything and everything. . . . 💰

.
 
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  • #34
OCR said:
They can, and will. . . Build one for anything and everything. . . . 💰

.

Roll cage is for rolling. I was referring to ordinary car framing that can survive container drop. Can't frames made of pure boron alloy be strong enough?

What is the stronger alloy or material on earth?

And has anyone computed the weight of container in truck and structural strength of car frames made of Boron alloy and whether they can survive the container drop. Since it's a drop, then the weight is container times say 3 Gs (Gravity?)? What's the formula. Let's compute.
 
  • #35
new6ton said:
If the 18-wheeler big rig truck pushed the other party car at stop. How come the person was ejected outside in the windshield when the speed was low?
Newton's first law does not care which car is stationary and which car is moving at 60mph. The result of the collision either way is that both cars lose (or gain) 30mph (for equal mass cars) and the person gets ejected at 30mph relative to the car.
 
  • #36
russ_watters said:
Newton's first law does not care which car is stationary and which car is moving at 60mph. The result of the collision either way is that both cars lose 30mph (for equal mass cars) and the person gets ejected at 30mph relative to the car.

Imagine both the person and car moving at 60mph. If the car suddenly stops, his body continues to move at 60mph ejecting him out of the windshield. But I haven't seen or read a stationary car with person inside being hit and got ejected outside the windshield. Please show some news items regarding this if I just haven't come across them.

Most people I know don't have curtain airbags. Since it's not possible to retrofit cars for these. Then what to do with millions and millions of cars without curtain airbags. These are only available in top variants or top model like the 2019 Fort Ecosport Titanium 1.5L. Most buys the Fort Ecosport Trend 1.5L without any curtain airbags. Can't a world body make all new cars manufactured everywhere in the world requiring curtain airbags or make them mandatory?
 
  • #37
new6ton said:
Imagine both the person and car moving at 60mph. If the car suddenly stops, his body continues to move at 60mph ejecting him out of the windshield.
Yeah, I get it - but how is that different from starting stationary and suddenly accelerating to -60mph? In both cases the car subtracted 60 mph.
But I haven't seen or read a stationary car with person inside being hit and got ejected outside the windshield. Please show some news items regarding this if I just haven't come across them.
I doubt it is a common scenario, so I'm not sure I would have much luck with that.
 
  • #38
new6ton said:
But I haven't seen or read a stationary car with person inside being hit and got ejected outside the windshield.
The issue usually comes about when people don't wear their seatbelt. If all of the windows are rolled up and don't break in the collision, they just bounce around inside the vehicle and break lots of stuff (including their neck). If a window is open (like on the hot Sunday evening), they often get ejected and optionally run over.

Bottom line -- always wear your seatbelt!
 
  • #39
Yes, seatbelt is very vital. That is why airbag is called SRS or Supplemental Restraint System.

However, seatbelt can't prevent the head from colliding with the sides during T-bone or side collision. Here curtain airbag prevents that.

For millions and millions of cars without possibility of curtain airbags. Is it better for the side windows (made of tempered glasses) to have film or tint that can prevent it from breaking into pieces or is bare windows better? See the actual tests:

 
  • #40
I was asking whether tint or film in windows have an adverse effect during T-bone or side collision is because outside the United States, many countries have cars with totally dark tint at daytime. 99% of cars have tint so it's like there is a film to the tempered glass side windows. This is the typical traffic outside the US:
container trucks.JPG
Not only do you have to struggle with very dark tint in your car with poor visibility at night. You have to struggle with container truck and fuel truck racing with you. I once had a professor whose car was squeezed between two containers and he died.

Ironically, outside the United States where curtain airbags is most important. It is only an optional choice and not available in many cars even 2019 models. This is why there are hundreds of death daily in many countries. What saved it is the super traffic that can take you 3 hours to just travel 7 miles (less chance of strong collision because of very slow speed).
 
  • #41
new6ton said:
For millions and millions of cars without possibility of curtain airbags. Is it better for the side windows (made of tempered glasses) to have film or tint that can prevent it from breaking into pieces or is bare windows better?
In my experience, the film on the side windows would have no useful effect on ejections or injuries from broken side window glass.

The side windows break into small cubes that do not cause lacerations for the most part. And any plastic film will not provide any strengthening of the window against ejection.
 
  • #42
berkeman said:
And any plastic film will not provide any strengthening of the window against ejection.


And any plastic film could "somewhat hold" the small cubes in place, and contribute to

more lacerations. . .?

.

 
  • #43
berkeman said:
The side windows break into small cubes that do not cause lacerations for the most part. And any plastic film will not provide any strengthening of the window against ejection.
It's definitely possible to have a plastic film that would strengthen the window. Ordinary window tint wouldn't though - you'd need something more akin to a security film used in home security, or the film used in the laminated glass in car windshields.
 
  • #44
cjl said:
It's definitely possible to have a plastic film that would strengthen the window. Ordinary window tint wouldn't though - you'd need something more akin to a security film used in home security, or the film used in the laminated glass in car windshields.
But please don't make the side windows as strong as the front windshield and the rear window. There's an important reason that the side windows are not made to that strength standard. They don't need to be, and making them that strong would make it much harder for EMS to access occupants in the vehicle. Just wear your dang seatbelts folks, and yes, upgrade to side impact airbag equipped vehicles when it works for you. :smile:
 
  • #45
berkeman said:
But please don't make the side windows as strong as the front windshield and the rear window. There's an important reason that the side windows are not made to that strength standard. They don't need to be, and making them that strong would make it much harder for EMS to access occupants in the vehicle. Just wear your dang seatbelts folks, and yes, upgrade to side impact airbag equipped vehicles when it works for you. :smile:
There's an interesting question though about safety there - sure, it'd make EMS's life more difficult, but it would also decrease the chance of getting ejected or having a limb severely injured after the window breaks in a rollover or the like. It's also not clear that your statement is true - many modern higher end vehicles from brands known for safety have started to go towards using laminated side glass, including Audi, Volvo, Mercedes, and Subaru. A (likely incomplete) list can be found at the end of the AAA report here.
 
  • #46
I guess I need to read up on that. So I will need to carry a fire axe now for side window access instead of my trusty EMS window punch?

1569797309500.png
 
  • #47
At least if you're dealing with one of those newer cars, yes. Many of them appear to only be laminating front windows though, so if you find yourself in a situation where you can't get through the front, try the rears (or even the back window - those frequently are not laminated either)
 
  • #48
cjl said:
A (likely incomplete) list can be found at the end of the AAA report here.
Rhut-rho...

Key Findings: All of the selected vehicle escape tools successfully cut through the seat belt material on all attempts. However, two tools performed significantly worse than the others during seat belt cutting tests, averaging 13.5 and 23.0 seconds to cut through the belt. The remaining four tools each averaged less than 2.5 seconds. In glass-breaking tests, four of the six tools were successful in breaking the tempered glass. Two of the tools, however, failed to break through the tempered glass (the type most commonly used for vehicle side windows). None of the tools were able to successfully break the laminated glass, which stayed structurally intact even after being cracked. The research indicates that it is nearly impossible to break through laminated windows withoutspecialized equipment.

So it's not just harder for EMS to gain access, it's harder for the occupants of the vehicle to self-extract after an accident. Hmm...
 
  • #49
berkeman said:
So it's not just harder for EMS to gain access, it's harder for the occupants of the vehicle to self-extract after an accident. Hmm...

Yes, but you have to balance that against the reduction in injury and death caused by the lower chance of ejecting the occupants, as well as the ability to better contain limbs and body parts during a rollover. If the window breaks away easily, it's also very easy for your arm to end up getting crushed by the car during a rollover if it ends up going outside of the window. It's a balancing act between ease of rescue after the fact vs maximum protection during the accident. I haven't seen enough data to know which one ends up being safer overall.
 
  • #50
new6ton said:
Yes, seatbelt is very vital. That is why airbag is called SRS or Supplemental Restraint System.

However, seatbelt can't prevent the head from colliding with the sides during T-bone or side collision. Here curtain airbag prevents that.

For millions and millions of cars without possibility of curtain airbags. Is it better for the side windows (made of tempered glasses) to have film or tint that can prevent it from breaking into pieces or is bare windows better?
A very easy-to-apply safety measure to compensate for the lack of curtain airbags is wearing a helmet.
 
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