Protection from rear impacts - tunacat
Will NCAP ever test how well cars protect rear-seat occupants from impact from the rear? Or in the grand scheme of crashes is it just statistically unlikely that your car will be hit up the rear with great force? Or do they assume that if it happens, it'll be a modern car with a good crumple zoney bonnet that hits you, and therefore IT will do most of the absorbing for you?

For the first time in probably over a decade I recently rode in the back of a supermini ? a ?99 Micra, on a fast but curvy single-carriageway trunk road, and I was surprised how vulnerable I felt with another vehicle also doing 60 mph close (but not unduly) behind.
Blimey, in a Ford Ka, the back of one?s head must be practically brushing the rear screen.

I was reminded of that traffic-cops type TV programme on several months back where a young woman (the driver) had tragically been killed when her car (was it a Peugeot 206?) became sandwiched between a truck and an Audi estate. The truck was big-ish but not an HGV, and it turned out its driver had been fiddling with a cellphone, and realised so little of events that he thought he?d crashed into the Audi.

I have read that it?s recommended that baby seats are safest in the rear seat of a car, but it feels to me safer for a 2 year old toddler?s forward-facing seat to be strapped into the front passenger seat in a ?99 Micra in case anything runs into the back of the car.

Bit of a dilemma really, if you?re after a car which is shortish in length (perhaps you have limited parking space) ? but need to be able to seat people in the back.

I?d be interested to see the comparative rear-impact performance of say Fabia and Focus hatches against their saloon and estate versions.

I see Fifth Gear are to (frontal) crash a Renault Modus into an old Volvo (240-ish) on tonight?s programme. I?m betting that the Modus will be deemed to ?have done well, and have minimal deformation of the passenger compartment?, ?but what G-forces would its passengers have been subjected to? As Clarkson observes, ?Speed never killed anybody. It?s the abrupt stop that does for you.?
In other words, it?s all very well having a rigid passenger cell, but surely there?s little substitute for plain old distance (and therefore time) between point of contact and point of coming to rest?

If I?m travelling at 10 m/s (22 mph) and crash into a rigid immovable object like a concrete bridge pillar, but my theoretical car?s bonnet is 5 metres long, it may have been fairly easy to engineer the car to take 1 second to crush the entire length of the bonnet, in which case I?m subjected to a deceleration of 1G and laugh it off. But if my bonnet is 1 metre long, I?m subjected to 5G. And so on.

In the case of a lighter, short-bonneted car crashing head-on into a heavier car, the small car may not just come to rest, but may finish up going backwards, i.e. a deceleration through zero mph and out the other side.

Maybe at typical speeds the difference in G forces with a bonnet 1 foot long rather than 5 feet long aren?t significant (they?re both very bad)?
Number-Cruncher to crunch some numbers please.

I think the accident in that TV programme some months ago happened at a motorway exit notorious in rush-hour for vehicles having to queue along the left lane of the motorway itself. Not a terribly uncommon scenario these days, so, Messrs NCAP (or somebody), what about measuring protection from impacts to the rear ?

Protection from rear impacts - Westpig
slightly off your thread i know......but a helluva lot of people could do themselves a favour on this subject by regularly checking their brake lights

there seems to be an epidemic of no brake lights at all except the high level one (i.e. the two lower ones don't work, but the higher one does)

how many drivers actually bother to check them, very few i'd suggest. I had a Rover 600 in the past and that used to regularly blow them for some u/k reason
Protection from rear impacts - Collos25
Fitting a towbar generally helps.
Protection from rear impacts - DP
Buy a mkIV Golf!!

Parents-in-law were rear ended "square on" by an artic when stationary in queue on the M40 a few months back. Police reckon it was doing 40 when it rammed them into the car in front.

Car obviously a complete write off, but drivers door still opened, and the passenger one would have if the car in front hadn't landed on the bonnet and stoved the A-pillar in. They were physically uninjured.

I'm not a big fan of VW products, but respect is due here.

Cheers
DP
--
04 Grand Scenic 1.9 dCi Dynamique
00 Mondeo 1.8TD LX
Protection from rear impacts - daveyjp
The taxi driver we saw being rear ended last Friday would have had more protection against the head injury he sustained if he had been wearing his seatbelt. I hope this is taken into consideration when any compensation payout is assessed.

He stopped at a crossing, but the Corsa following didn't. The taxi shot forward and knocked over the pedestrian, I imagine the Corsa will be written off.
Protection from rear impacts - flunky
The taxi driver we saw being rear ended last Friday would have had more protection
against the head injury he sustained if he had been wearing his seatbelt. I hope
this is taken into consideration when any compensation payout is assessed.


Quite possibly true, and if no-one else had been involved it might be relevant (i.e. if he was claiming on his own insurance).

But as it's third party negligence, the third party has to take the consequences of his actions.
Protection from rear impacts - Morpheus
What are the chances of anyone ever getting to know he wasn't wearing his seatbelt...

I bet he won't admit to it, the car that hit him from behind might not have known and even if they did then who'd believe him when he didn't even see the car in front...?

I agree totally with what you are saying he shouldn't get anywhere as much though.. plus he should get a nice fine for not wearing it...
Protection from rear impacts - rtj70
Rear ended by an HGV in Italy last summer whilst we had a Fiesta. No idea how fast the HGV was going when it hit us. The HGV itself was also then run into by a tanker lorry.

The Fiesta back end was crushed in a lot. The roof in the rear caved in and there was a V shaped intrusion across the back of the rear seats. Had there been anyone in the rear they would be dead with massive head injuries. There would have been no way to survive. The caved in roof ripped the back of my head open - about 1.5 inches across all the way through to the skull. I also got knocked unconscious and don't remember anything until I was looking out of the ambulance. Who got me out I have no idea - other drivers possibly or the ambulance crew. Wife stayed conscious throughout but split her lip and broke a tooth. She was shouting for help for me as she thought I was dead with blood pouring out of my head.

So yes I think there should be rear crash tests.
Protection from rear impacts - flunky
I agree totally with what you are saying he shouldn't get anywhere as much though..
plus he should get a nice fine for not wearing it...


Don't you think the crippling injuries are punishment enough?
Protection from rear impacts - tunacat
Thanks for that example RTJ70; I hope you are well-recovered from that injury. You illustrate my point though - had your car been a Fabia rather than a Fiesta, I wonder how much better (or worse) it might have fared if it had been the saloon or estate version?

Andy Bairsto's towbar idea is interesting - admittedly it's going to be fairly rigid, so you're going to get more push and less crush, and therefore more whiplash G-force. But I suppose high G for a brief period at least gives you a chance of survival, where crushing within the passenger cell probably doesn't.
So, if you must have a stumpy-tailed hatchback, always fit a sturdy towbar?
Protection from rear impacts - rtj70
"had your car been a Fabia rather than a Fiesta, I wonder how much better (or worse) it might have fared if it had been the saloon or estate version?"

Had the car say been say an S-MAX, the Peugeout 4007/Mitsubishi Outlander or any vehicle with similar seating arrangement with people sat in the boot.... Might be bigger and stronger cars but we were hit by an HGV.
Protection from rear impacts - nick
As in some other things in life, there's no substitute for size. You are always going to be better off in an NCAP 5* large car than a 5* supermini. More sheet metal and distance between you and the outside world plus better crumple zones. It would be interesting in these times where we are encouraged by the tax system to buy smaller 'greener' cars to see whether the level of injuries and deaths goes up as the the proportion of smaller cars increases. Perhaps because there will be more small car/small car accidents rather than big car/small car accidents there'll be little difference. But I would suspect not.
Protection from rear impacts - gmac
I would imagine the rear of most cars and especially superminis would not deform as much as the front.
The fuel tank is usually located in the area under the rear seat. It would not do much good to have that split depositing petrol onto a hot exhaust or hot engine of the impact vehicle.

A comment earlier about the Nissan Micra and preferring to put a toddler seat in the front passenger seat rather than the rear. OK, would provide better protection from a rear end shunt but very little protection from a side impact. The space between the back of the car and the rear seat must surely be greater than between the passenger door and seat.
Slightly off topic of this discussion as this was specifically talking about rear end impacts but I would have thought a better shaped rear seat cushion and putting a toddler seat in the middle of the rear bench would provide the optimum space all round for impact absorption.
Protection from rear impacts - normd2
a friend of mine was in the middle of a 6 car pile up at traffic lights ( the guy at the front stopped on a red!!!!) I arrived at the scene 5 minutes afterwards and stopped to see if he was ok. He had a Laguna witha towbar and was rear ended by another Laguna which was itself hit by a Vectra. My point here is that looking at the two Lagunas one with a tow-bar and one without, they both had very similar damage from 35-40 mph impact. A tow bar is designed to tow with it's not an extra bumper.
Protection from rear impacts - Lud
Driving westwards on Marylebone Road one sunny lunchtime in the sixties, sunroof open. Stopped gently at a traffic light in the outside lane. A repmobile drew up gently behind me. Several seconds later there was a squeal of tyres and a double bang. I felt a gentle impact. Some East European clown in another repmobile had rear-ended the car behind very hard and shunted it into the back of my R Type Bentley, then 16 years old or more. The culprit was running up and down saying: 'I vos blinded by a reflection! I vos blinded by a reflection!' Surprisingly, no one tried to kill him.

I was unhurt, not even shaken, but the Bentley was a goner so far as I was concerned. Quite apart from the huge aluminium boot lid which may or may not have been repairable, the elegant curve over the offside rear wing of the car was bowed outwards three inches or so. Repairs worth three times the car. I had just had the rusty front wings done properly too. Both the other cars were bleeding oil and water in large quantities and were dead. The Bentley drove normally.

Sad story I have told here before. Sorry to be a pub bore.
Protection from rear impacts - billy25
when I walk up the street I always find myself looking at these small cars, and i imagine what it would look like if my old Senator gave it a good belt up the backside. I'm afraid to say that crumple zone or not, most rear seat passengers would have broken backs, not a pleasent thought! but something to think about if you are planning to buy one.

Billy
Protection from rear impacts - Bill Payer
I did read somewhere that it worth keeping keep the rear seat belts fastened at all times, and that you should certainly make a point of doing it if the car has folding rear seats and you're carrying stuff in the boot.
Protection from rear impacts - billy25
Hmm, i've thought about this myself over the years, I can see the point of the seatbelts in a "head-on", restraining you from flying forwards and being severly injured or causing injury to others, but in a "rear-ender" surely they may make any injuries you recieve worse, by the fact they are providing "resistance" to the impact, and not allowing you to be pushed away by the initial impact. If you see what i mean!.

Billy
Protection from rear impacts - Bill Payer
If you see what i mean!.


I meant when the seats where unoccupied.
Protection from rear impacts - gmac
I did read somewhere that it worth keeping keep the rear seat belts fastened at
all times and that you should certainly make a point of doing it if the
car has folding rear seats and you're carrying stuff in the boot.

>>
I saw some crash test video with regard to cargo in the boot area bursting through the rear seats.
Fastening the seatbelts will not help on many hatches as the centre seatbelt is located in the seat itself.
The only hatchback I've seen which prevented this was the mid-90's SAAB 900 which has a bar, almost like a strut brace, which is at behind the seat at the top and the seat actually locks into. This prevented the seat from collapsing in an accident.
Protection from rear impacts - Bill Payer
Fastening the seatbelts will not help on many hatches as the centre seatbelt is located
in the seat itself.

Certainly not on most (all?) recent cars. The diagonal mounting for the 3 point middle belt is in the roof. Out Jazz is 4 yrs old and it's like that, and I'm sure the Clio before it was the same.

Anway, if you fasten the outer belts, they will hold the seat back in place.
Protection from rear impacts - gmac
Anway if you fasten the outer belts they will hold the seat back in place.

Not if the weight in the boot hits the middle of the seat.
Where the 60/40 seat back joins there is no support so the seat simply separates and whatever was in the boot enters the cabin. The seat belts will only hold the backrest at the side of the car should the seat back clips fail. There is nothing in the middle of the rear seat to stop the seat separating except, as previously mentioned, in the case of SAAB.
Protection from rear impacts - rtj70
The middle belt of a Mazda6 actually fixes to the roof so wonder if that would withstand forces from heavy items in boot?
Protection from rear impacts - BobbyG
I thought taxi drivers were excused from the seatbelt law for reasons of their own security? I have never seen a taxi driver wear one?
--
2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS
Protection from rear impacts - Lud
So that they can escape from murderously irate passengers when they've just taken the third deliberate wrong turning in a mile?
Protection from rear impacts - BobbyG
This reminds me of Clarkson once talking about MPVs like Zafiras and he said along the lines of, you buy the big car with all the seats for your precious little darlings and then what do you do - you let them sit in the rear crumple zone with their heads almost touching the tailgate!

Fair point!
--
2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS
Protection from rear impacts - Xileno {P}
I agree with Clarkson (for once). I was looking at one of those Zafiras on Saturday and with all seven seats in place the rear ones are quite close to the tailgate. I'm not sure I would want to sit there or put kids there either.
Protection from rear impacts - Lud
Like putting children in the bed of a pickup, or letting them stand on the running board of an old car or the back axle of a tractor, the rearmost seats of a 'people carrier' are all right for short journeys in slow or light traffic (going down to the beach), but you wouldn't want to drive across Europe on motorways with your nippers sitting back there, especially around Milan in rush hour.
Protection from rear impacts - normd2
I have a people carrier and can think of many saloon cars that have a shorter distance between the back of the rear seats and the outer edge of the rear bumper.
Protection from rear impacts - Pendlebury
There are alot of comments here from people driving big cars that think they will smash a small car to pieces if they hit it from behind.
Once agin like the Volvo and Modus test this is not necessarily going to be the case.
Old Senators do not have a high tensile steel safety cage like modern small cars.
I appreciate that hitting one from the rear - then it may not be as well protected than from the front but the safety cage design does tend to surround the passenger cell.
Also basic laws of physics state that for every action, there is an equal and opposite re-action.
When you have a safety cage that transmits these forces around the cell and not through like in an old car then you will be better of in the small car again.
Having said that there is alot more work to do on rear impacts to fully protect the occupants.
This can be done one of 2 ways - strengthen the car even more or reduce the forces of the car doing the impacting with things such as CMBS from Honda, Lexus and MB where the car senses it is going to run into the back of another car and then hits the brakes hard and warns the driver.
Protection from rear impacts - nick
I think the point is, big new car safer than small new car.
Protection from rear impacts - blue_haddock
I'd still rather be hit in my 20 year old landie than in a brand new micra.
Protection from rear impacts - jase1
Friend of mine was rear-ended on the motorway, probably at about 60mph. His car was at a stop. It was an Alfa 147, admittedly only a 3-star car, but the entire rear section of the car was destroyed. He was OK, but if anyone had been in the back they would certainly be dead.

Rear impact protection is certainly not as good as the front (obvious really), and I think I'd still rather be in the back of an old Volvo than a new Modus that was struck from behind.
Protection from rear impacts - BazzaBear {P}
Friend of mine was rear-ended on the motorway probably at about 60mph. His car was
at a stop. It was an Alfa 147 admittedly only a 3-star car but the
entire rear section of the car was destroyed. He was OK but if anyone had
been in the back they would certainly be dead.


I'm not sure the 3-stars have much to do with it. At a 60mph closing speed, I wouldn't expect there to be much left of any car.
Protection from rear impacts - Lud
big new car safer than small new car.


Big old car too... :o}

My sister was sitting in the back of my father's 1200cc Mk 1 Cortina, hesitating at the wrong moment when a fast-moving Zodiac came over the horizon on Salisbury Plain, ran into the back of it and wrote it off. She was bruised by the old man's toolbox which surged through the back seat, but not seriously injured.
Protection from rear impacts - rtj70
If someone wants to post a picture of my hire Fiesta on the HJ MSN photo site I can provide. Low quality as it came via Hertz. When I pulled out a camera phone when retrieving (remains of) luggage I got shouted at by all present including two police officers!
Protection from rear impacts - tunacat
Do you know why that was, RT?

In this country the general instruction is always to take photos at the scene of our own accident if we have a camera available.

Protection from rear impacts - rtj70
The car was no longer at the accident it had been moved and was in a compound. I was in no state to take a picture of the accident itself. But the fact an HGV was parked in the boot gave a few clues. Closed roads out of the airport for a bit I think.

No idea why I wasn't allowed to take pictures of the car at the compound though.
Protection from rear impacts - Bill Payer
the rearmost seats of a 'people carrier' are all right for short journeys in slow or light
traffic (going down to the beach) but you wouldn't want to drive across Europe on
motorways with your nippers sitting back there especially around Milan in rush hour.

Don't most accidents happen within 3 miles of home?
Protection from rear impacts - Gromit {P}
Now most makers can build cars to meet NCAP's 5 star standard, a sixth star for rear impact (and other factors) can't be far off. The scheme started with four starts, after all, and on the very first round of tests many cars in all sizes tested strugged to collect two stars.

As to the taxi driver referred to above not wearing his seatbelt, taxi drivers in Ireland are exempt from the law on wearing belts because its thought more likely they'll have to make a quick escape from being robbed or assaulted that they'll be invovled in a road accident. Which is alarming when you consider the mileage most cabbies do in a year!
Protection from rear impacts - Manatee
Don't most accidents happen within 3 miles of home?


This is a real "shark attack" statistic, skewed by the fact that most cars spend more time within 3 miles of home than any where else.

(99% of shark attacks on humans happen in less than 3 feet of water. This leads swimmers wth a poor understanding of probability to believe that they are safer if they get out a but further)
Protection from rear impacts - Lud
>> Don't most accidents happen within 3 miles of home?
This is a real "shark attack" statistic


Not entirely. When people are on their home turf they unconsciously drop their guard and fall into last-few-corners habit. Can be disastrous.
Protection from rear impacts - Blue {P}
What are the chances of anyone ever getting to know he wasn't wearing his seatbelt...


As a taxi driver he is *not* legally required to wear a seatbelt, therefore he was doing nothing wrong when he was smacked into by the Corsa. Therefore he will get a nice large payout, as well as loss of earnings, lets not forget that whilst he'd off the road his mortgage probably isn't getting paid.

I vaugely remember something from my law module about liability and how "you do not choose your victim" (I'm sure someonce can remind me what the precedent was) but basically the gist is, if you run over someone who has a bad back, and as a result the injuries are worse than if you'd run over a healthy person, you still end up paying a larger quantity of compensation. You can't just avoid compensation (or reduce it) on the grounds that a "normal" person wouldn't have been hurt.

Personally, if I was a taxi driver, I would probably wear my belt, but then if I'd had it wrapped around my neck and been robbed I may well reconsider.

Blue
Protection from rear impacts - daveyjp
"As a taxi driver he is *not* legally required to wear a seatbelt"

Like most law it's not as straight forward as that:

Hackney Carriage drivers are exempt from wearing seatbelts whilst they are on duty. (i.e. whether they have a passenger or not). Private hire, are only exempt when carrying a fare paying passenger. They must wear a seatbelt at all other times.

This was a private hire taxi with no passengers.

Protection from rear impacts - Leif
Tunacat: An interesting post and something I have often wondered about. Surely that is the one thing you want to be good, since you can look after yourself and not drive into someone, but you cannot prevent a moron from driving into you. The Mercedes A class is supposed to be very crash worthy despite being small. If there is a queue, I always try to stop with some distance ahead, I imagine it helps a bit in the case that I am rear ended.
Protection from rear impacts - Brian Tryzers
I put this question a few months ago to a Citroen salesman, who was busy telling me about the new 7-seat Picasso's five NCAP stars. His response - which I suspect may have been an inspired moment of improvisation - was that the raised seating position of MPVs allows the chassis to dissipate the energy of a rear-end collision downwards, rather than into the third row. This still doesn't convince me that putting passengers just 520mm (Mazda 5 570mm; Toyota Verso 440mm!) ahead of the back bumper is a good idea, and I'm close to dropping my search for a seven-seater for this reason alone.
Protection from rear impacts - BobbyG
What proportion of accidents come from rear impact as opposed to head on, side on etc?

We are worrying here about how close to rear of car we are yet we sit right next to a door most of the time with our head inches from the window.

I daresay if you are mostly motorway traffic then higher percentage chance of a rear end shunt, whereas on a lot of country roads possibly more likely to be head on or side on, rather than straightforward running into the back of someone?
--
2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS
Protection from rear impacts - rtj70
But there are doors beams to dissipate energy in side impact and curtain air bags to move your head away from the side of the vehicle.

My real world example is the roof caved in and would have killed rear passengers with major head trauma.

BUT I still think the Fiesta did extremely well when it was an HGV that hit us. Try that in say an older super mini. Praise to Ford.
Protection from rear impacts - rtj70
"an inspired moment of improvisation - was that the raised seating position of MPVs allows the chassis to dissipate the energy of a rear-end collision downwards"

The Fiesta we had in Italy obviously a class below, but the HGV hit the rear which is reasonably vertical. It therefore squashed the car and it got shorter. The way this happened was the roof caved in, taking a V shape across the rear bench. I still have the scar to prove it also affected front drivers. I wonder how an S-MAX or Mazda MX5 and similar vehicles would have fared.
Protection from rear impacts - bull bars anyone? - Bilboman
I would like to see all those ridiculous bling bullbars fitted to ginormous Chelsea Tractors forcibly torn off simultaneously (at 4 am tonight while most of their owners are asleep).
Do any of these bull bars actually see proper "service" on or even off-road? Last time I saw a rampaging herd of wildebeest in Marylebone High Street was, er, let me see now...
The confiscated bull bars should then be sawn up, cut to size or even melted down (same as Granny's saucepans to help with "the war effort") and re-fitted, free of charge, to the REAR of NORMAL cars, to protect NORMAL ("Hey, don't look at me, I'm not affluent and endowed with a truly massive ego) drivers and passengers from rear-end shunts. Rear end shunts caused by, erm, Chelsea Tractors, whose drivers can't see where they are going (huge vehicle) or manoeuvre properly (large vehicle) or hear the crunch of the crash (MP3/Bluetooth headset/mobile stuck to ear).
Sorted.
Protection from rear impacts - bull bars anyone? - flunky
I would like to see all those ridiculous bling bullbars fitted to ginormous Chelsea Tractors
forcibly torn off simultaneously (at 4 am tonight while most of their owners are asleep).


They are illegal now, to fit to any vehicle, and have been for a couple of years.

A softer kind of bull bar is permitted
Protection from rear impacts - bull bars anyone? - Bilboman
Thanks for the update: I've been living in Spain for some years now and wasn't aware that bull bars are now "out", at least techcnically.
Having said that, I saw quite a few cars and vans, mostly Berlingo types (duh?) fitted with them in London and on the motorways this summer, presumably having been removed for the MoT and then re-fitted for whatever aesthetic effect their brain dead owners believe they bestow.
The MoT catches some of these abominations but aftermarket black window tints, headlamp "restyling" kits, skirts, ironing-board spoilers, dodgy number plates and the lot still seem to abound.
Protection from rear impacts - billy25
>>This still doesn't convince me that putting passengers just 520mm (Mazda 5 570mm; Toyota Verso 440mm!) ahead of the back bumper is a good idea,<<

This is exactly the point i was (poorly) trying to get over higher up the thread, two ton of Senator, led by a huge hunk of straight -six iron is going to give you severe back-ache!
520mm is only two hands span, I wouldn't want to be there 5*'s or not!

Billy