Fifth Gear: Best Speed To Go Over Speed Bumps
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- เผยแพร่เมื่อ 16 ก.ค. 2018
- Jon has been doing some research into the speed bump and what the best speed and car to go over them with.
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In Bulgaria, we don't need speed bumps. In Britain, you drive on the left, here, we drive on what's left.
Хаха вярно е.
Haha! 😂😂
Poland is not much better
Our roads (UK) are just so overloaded it’s hard to keep up with repairs!
Sadly the same here in Brazil my friend.
The best car for going fast over speed bumps is somebody else's car :)
I quite like a hire car...
Oliver Watson haha yes, nothing accelerates like a hire car :)
I do prefer company car
handbrake is also the most powerfull in a hire car :)
@@karelpipa
Also the fuel gauge needle has the fastest downward movement..on a hire car
I find the best solution is to aproach them slowly and then wheelspin away, This is the most satisfying.
Rage Fire we started doing that after some jackasses put up 5 illegal ones. They didnt get the point and called the cops who fined them.
Nice job I don't see why they should be damaging the suspension and tires of law abiding people. They should spend the money maintaining our pothole riddled roads.
Rage Fire ..... we may have created some potholes due to our burnouts.
Oops
Hahaha, best wheelspins and handbrake turns are done with a hire car, potholes and speedbumps as well 😆😆😆
These so called 'speed' bumps don't work at all - if anything they slow you down!
Thats the point to slow you down but I still dont like them
I think you may have missed the joke.
wooooooosh
For some reason in Mario Cart they make me go 4x faster, why not in real life?
@@RyanCunningham12 it's a real life glitch..getting patch soon I hope 👍
For a speed bump that lenght you'd need to go over 144km/h for the shock to start reducing, so long as the suspension can retract as far as high the speedbump is. If you can find a speedbump about 1 meter long you can reach this critical speed at ~50 km/h
Take away message: buy an old Citroen
Dayno or one with hydroneumatic suspension anyway :)
fucking fall apart
sam they are actually quite reliable
Yes, bought a 2000 vintage Xantia in 2016 with 114000km on it, now it has 185000km and it just works. If you keep looking after it (what you should do with all cars, actually), a Xantia is a steal. In their time they were more reliable than most of the competitors.
or a citroen c6
The speed bumps here in Chicago are about twice as tall as yours. They rattle my teeth if I hit one unaware.
How do owners of supercars cope? I have a normal TT and struggle with much smaller bumps
These aren't your typical speed bumps, where I am in South East London they are very short in terms of length but very high, if you go over them too fast (even as slow as 15-20 mph) you can easily scrape the bottom of your car on the way down the bump, as I did in my previous Mercedes C220.
greathey1234 Because of our snow and potholes super cars are not common here. I drove acZ3 for a few years and approached speed bumps a a crawl at 45 degree angle slowly slowly.
This is only one type of speed bump here in the UK. On the very road I live on the speed bumps are way steeper than the ones shown in the video.
The speed bumps here in Russia sometimes have scratches on them caused by car underbodies. And most of car models sold here have improved ground clearance over their european, japanese and american variants. :D
Notorious russian potholes sometimes are even on the speed bumps.
Wait, so softer suspensions with greater range of motion, and tires with higher sidewalls make for a nicer ride? I am shocked.
gyneve the Xantia has hydropneumatic suspension, which is the major factor here
Ah, I didn't realize that. That said, I still believe that older cars with conventional suspensions will ride smoother than modern cars on rough and bumpy roads.
That's not the case, as a previous Xantia owner it was like a magic carpet even on gravel.
Howmit works is there is a bulb instead of spring full of fluid and gas wich gives u this amazing ride so good rollsmroyce and mercedes licensed it from Citroen
luuzeri - except in ‘Service Mode’ 😁
Old citroen was real high tech. Today in psa citroen is just nice car...
Nice cars but not so reliable.
Ricardo Mateo Estévez Balvin the more people that day that the happier I am in getting the good Citroen's. Bought a 1997 Xantia for peanuts and has taken me 25.000km in between countries.
I bought a Xantia Break from 2000 exactly two years ago and enjoyed 70000km of unproblematic comfyness to this day. I love that car ;).
Yes, I agree. My old XM was way more high tech than my newer C5, even though the C5 have hydropneumatic suspension. That fabulous hydraulic brake is replaced with normal brakes, and it is not the same at all. It was just wonderful with that touch pad like brake pedal that had no movement at all. The first time I used the C5, I seriously thought I had lost the brake power, until I learned I had to press the brake pedal hard. Definately not nearly as good. That old XM even had a system to diagnose your car's suspension using the radio. Just tune in a certain wavelength and go for a ride, and you could hear the different things in the suspension and diagnose if they were working or not. And when emergency or hard braking, the XM would not dive forward at all, it was just as flat. It probably was because of the Hydractive, which my C5 does not have, even though it has the same type of suspension.
And now, they have removed everything, no high-tech left at all. Just cool design and that's it. It is a shame, really, when you look at the history of the brand and how revolutionary cars they used to make. It was not possible to get better cars than a Citroën. So innovative, so cool, so high-tech, so everything. And now, they are just like a Ford, perhaps cooler in the design, but thats more or less all.
I desperately want their Hydractive suspension back.
I love the Xantia shame there are so few left now.
Back in the 80s I had a schoolfriend with an Austin Ambassador (like the Princess) which used to float over speed bumps at around 40.
And suddenly I remembered some BeamNG videos with 200+ speed bumps being approached by cars doing 200mph!! 😂😂😂
Omg same
Reminds me of the small but very annoying plastic speed bumps I once encountered in Spain. They put on the road like 3 to 5 of them in a row with less than a meter beetween them. Then I observed the locals taking them at full speed and tried the same. Ideal speed was almost 80 kph so that only the first was keenly felt. In some places this ripped the bumps from the surface of the road. Which made them a lot smoother...
80mph is a good speed
You might get a little air time (and destroy your car’s suspension)
Lobe he would have gone faster if he had put into race mode (R)
+Steven1993 So you blow the whole suspension and tranny in the same shot, and as a bonus, you could get the bumpers removed, wheels cracked and rip off the whole underbody! Lol
If you are using a rental, yes
Apex Seal Demolition derby time!
Try Malaysia speed bumps... i guarantee your car will fly when approaching it at 25 mph..🤣🤣
felix liew so true...
25kmh already gets my car bouncing around...
RIP engine sump
Especially Satria neo
Malaysia authorities didn't follow regulations on building speed bumps.
Some can go as high as 12 inches. Plus with potholes... say bye bye to our beloved suspension, low profile tires and sport rims.... esp 17s 18s and 19s....
It works with shorter speed bumps, that one is too long for the suspension to absorb.
repawnd I think that shorter speed bumps are sharper on top (it's easily visible, this shown here isn't sharp at all!), so that would be even harder for the suspension! At least that's what I think!
i would really like to know the explaination of this...
because here is a road with lot of speedbumps,
half the sice of the one in the vid,
and when i go over the first two at 100 kmph its smoother than at 40kmph
but the last ones feel worse as you go quicker. i need to reduce to 40kmph xd
It depends. I have couple of speed bumps here that are tough to traverse at walking speed. Short sharp bumps. I accidentally went over them at some significant speed once and didn't feel a thing. When you go fast your tire will actually eat the impact rather than the suspension. Humps like the one in the vid apparently are too long for this phenomenon hence hitting the bump stops. Kinda hard to ignore one's own personal experience watching a video like this that is telling you when you felt nothing it was more uncomfortable. The "myth" lives on. I don't drive like this though, I am concerned at what cost my comfort is coming at in terms of suspension components and possibly rims if the bump is just to high or you are just too fast.
If the bump is anywhere near the wheelbase of the car or longer then the car will pitch forward as the front wheels are going down while the back wheels are rising. On shorter bumps the high speed part of the damping circuit in the shock is opened by hitting the bump fast, which will give a better ride. The heavier the body of the car the better too as it take more force to move it up and down suddenly on bumps - making the car really heavy while the wheels and suspension are relatively light is a good part of the reason heavier cars ride more smoothly.
@@CapitanInfernal im not saying that this is the case, but something to think about anyway.
If you are braking for the speedbump, you are loading up the front suspension. Meaning the car is essentially pushing into the bump, making them rougher.
Love the Citroens :-)
There’s some truth in this myth, at least with hydropneumatic Citroens. As long as the bump height is fully within the suspension travel, with some margin, faster will smooth them out.
You’ll need the margin as the suspension stiffens up the closer it comes to its bump stops.
The older the model, the more travel they have.
But I know from experience that I can go over a few bumps where we live, with our Xm, without feeling them. Other cars typically scratch their bumpers!
Comfort is one thing, mechanical sympathy is another. Drive slower the less load force on the suspension the longer the shocks and springs last. Hydropnumatic gives a better ride but more expensive to repair, the less load on the suspension to longer it will last.
Except in a car designed for a ploughed paddock without breaking a basket of eggs. Citroen 2CV.
My record for a 15 kph speed hump in my Citroen 2CV was 90 kph... very comfy.
I could not get to the 115 kph top speed because of lack of runup distance....
Torsion bar is really good for this too lol
I have done the same but not at that speed with a 2cv, you barely feel it, compared to a modern car
If you talk about comfort, at the end Citroën always wins
They should have tested that prototype with Bose magnetic suspension. lol
As "repawnd" said, it is only true for short speed bumps. The faster you go, the least you feel, since the suspension shock (not being a stiff one) travels up and down very quickly, therefore it barely creates vibrations in the structure. The counterpart is that the less you feel the bump, the more damage you can do to the suspension.
In Brazil the speed bump is a small sized mountain
If you're going fast over multiple speed bumps in a row, the ride can feel smoother, but it is harsher for the car. In Spain we have many speed bumps that look like a little bit less than half a telephone pole is laying in the road, they are made of plastic and rather uncomfortable to drive over. When there are multiple in a row of them it is sometimes better to just keep your speed up, the first bump will be bad but the rest are better. Big bumps you go slow over, small bumps you go fast, as the expense of the suspension and wheel alignment.
The "urban myth" isnt about speed your going its about accelerating right before so weight of vehicle shifts to rear lifting front of vehicle slightly. Similar when you cant avoid a deer so you speed up right before impact so your more likely to have it go under vehicle
In India we have a goat to deal with. Going fast over a goat is an experience to behold.
I remember in highschool people would get stuck on them in the winter and caused more problems than fixed. School board member was one of the people who got stuck on it, when spring came they ended up removing it.
I liked to go slow over the first speed bump then floor it to the next one and brake heavily on the limit just before the second one and end up going slowly over the second one then calculate you max speed just before you hit the brakes on the second one.
That was in my younger days not now though lol.
That looks so gentle compared with the shock/spine busters they have in the US. For a little while I had to stay in an apartment complex with them, one right by the leasing office. I often tended to be a little "uncoordinated with the gas and clutch" after going over it, my car having a rather loud exhaust at the time. Give them my opinion of their "traffic quieter."
Mr Trundle!! Brilliant.
there is some speed bumps we have in Australia, they are made of solid rubber, they are about 1.2-16meters wide, i worked out that at 40kph they recommend is rough as guts. do 80 and its so much smoother.
Recently bought a 25 year old Xantia 1.8i with miraculous 22000 miles. Grinning ear to ear watching this.
What speed bumps?!
In my country we off road, on the road LOL!!
The bump you're testing on is the dream bumb over here
I can remember when speed humps were in their infancy that in Ayr they had lines of bricks raised and lowered in lines across the road IIRC there were about 15 sets in lines. The slower you drove the rougher the ride, hit them at 30 mph and it was like driving across a cattle grid. They had the exact opposite of the desired effect, faster = smoother. Whoever was in charge at the highways department was clearly not a genius 😂
His last line just blew my mind. From this astonishing conclusion, I have calculated the optimal speed as 3.14159 circular rotations per minute.
I owned a 1997 Xantia when I was a student. Yes, it is very comfortable but no where near as smooth as an old Mercedes W124. Modern car manufacturers are obsessed with sporty suspensions and big wheels. They are very good in race tracks but I actually live in the real world.
greathey1234 I suspect your suspension balls were shot, I've had both cars and Xantia was far more comfortable than a w124 200D. The Mercedes was also more boaty. But I loved them both. I agree that a comfort focus would be nice to have back on everyday cars.
+luuzeri The Xantia was cool but they disappeared from the roads relatively quickly vs it's contemporaries. Was it a rust box / prone to mechanical failures or something else? You rarely saw them by the mid 00s...
TheRealD4VID I'm not sure if it applies to the first models but at least later Xantias had zinced chassis so no major rust issues. But it's a cheap car yet requires if not expensive, regular maintenance or the hydropneumatic system can fail in a costly fashion. Iirc the diesel engines were also a bit problematic.
TheRealD4VID Not sure, I think for rust not really. They call it a French Toyota (all is relative) making it boring for some Citroen lovers to work on. They are still around but I think many people have embraced the cheap C5. XM's are to troublesome for many and the C5 is simpler but also quite comfy. I'm happy with my Xantia. Cheap and durable. But I have seen some in areas with a lot of salt on the roads.... That is not good for them.
What did you study?
Citroen hydropneumatic suspension should be on every car.
They will never catch on !
Consumer advice: daily drive a baja truck like the one bj baldwin has
I have a speed bump near my home where if you go over 5mph you'll risk scraping the bottom of your car. So I tend to avoid that road.
The “bumps” here are actually speed hump. There is in fact a defined difference between the two. If you think these are bumps, try coming to the US and see what we have here.
AJAXBURGER im guessing its because Americans are typically known for buying 4x4’s and much bigger cars, im guessing they’re just compensating the difference in the US so they make the bumps bigger to slow you down more. Hatchbacks and smaller cars here in the UK are more typical so there is less need for a “bigger bump”
Ross Roden your reasoning is logical but if you look into the two, you’ll notice there’s no real reason for them to be the way they are.
Making those that are called bumps in the US is likely quicker therefore easier and cheaper.
Yes, we in the US, like in England, have a variety too.
take the hump one wheel at a time at an angle at the right speed depending on the size of the hump and it'll be smooth af. Basically ur using the weight of the vehicle to compress one spring at a time. I do this all the time on my truck or get a citroen
Going over short speed bumps using that method is extremely bad for handling and suspension system and can actually misalign tyres!
the tyres and suspension gets way more abused everytime you start driving your car than just gg over speed bumps. They are made to take alot of abuse. Plus its recommended to get the alignment checked everytime you replace those worn tyres.
well... Old Renault 19 survived 50 mph over speed bump, several times. Only problem is, passegers on rear seats jumped off the seats :D
In Sweden, they invented intelligent speed bumps!! if you drive over the speed limit the sensor will pick it up and the bump would appear as section of the road ahead of you goes down, which will make you slow down but for other road users, who choose to stick to the speed limit will not have to deal with them or have their cars abused just because others chose not go fast.
But here in the UK, people like these guys are wasting valuable time and money researching how fast can we go over a speed bump
Because the government are evil over here. Better to go into battle with them than trying to play along with those devils.
Have you tried the hydrolastic suspension of the mini??
It's good to see Beavis cut his hair and is still in television.
I think the old Citroen DS is the best for speed bumps. It certainly is for French speedbumps here in Brittany!
In Physics Impulse equals force x time.. (i=Ft) which means if a force is applied over a large time limit, then the magnitude of impulse reduces and if applied in a lesser time, impulse increases.. therefore by going faster we reduce the time over which the force of same magnitude is spread out.. hence increasing readings with increase in speed.
Those are speed humps though, a lot of the speed bumps we get in Canada aren’t smooth like that, they’re these short little rounded curbs of back pain and it doesn’t matter if you’re doing 10 km/h, it’s incredibly jarring at every speed
Try doing that over North American speed bumps. Only about 30cm long and 15+cm tall. Will break the suspension and your backside.
i like messing the lawn around them, and screeching tires as I leave, billowing black soot
The urban myth might not be true for speed bumps but I am fairly certain that it is true for those cattle grates on exit ramps. Super violent at slow speeds but if you take them at 30 or 40 mph they feel a lot more smooth.
I think the forward and backward motion created by bump on that is uncomfy decreases with higher speed
If I pass one of these on my SUV slowly I feel the shake more than when I drive 50 miles an hour.
Passing them quickly feels more comfortable and less stressful on my car
It isn't. In reality what this is doing is preventing the car from raising and lowering, and transferring the load to the suspension, so instead of the "up and down" movement that you get with going slowly, you stay level but get large shockwaves, which can be very uncomfortable, not to mention ruins your suspension if it's constantly hitting the bump stops.
This can be done much better. All you have to do is brake in front of the speedbump, release the brake at the last minute to lift the front suspension and then press the accelerator. In my old Citroen CX I mastered this so that, sitting in the back seat, you didn't even know there was a speedbump.
Nice anchor
the myth can actually work with potholes and stuff like that
it happened in a video where a guy tried to hit a pothole as hard as possible and he skipped over it so he had to slow down to actually hit it
and it makes sense from a physics standpoint that you dont have enough time to get the wheel to fall in the hole
also the suspension of this citroen is better because this type of suspension is better and i dont know why they havent implemented it in other cars
It depends on how high the bump is and how much suspension travel your car has.
My dad had a Citroen xantia. It was a Brilliant car!!!
Yea I bet. When it has worked. Whenever that might have been.
Frank White Actually it was one of the most reliable cars he has owned!!!!
lol! What were the others? Custom paper cars? xD
All jokes aside, a friend of mine used to have a 2.0 Turbo Xantia Activa and it would literally be sitting broken half of it's lifetime. The other half it would do all kinds of weird stuff with its suspension and electronics. Constantly with something malfunctioning.
Frank White the car had just been really well looked after. But then the cooling system failed and the engine would overheat after about 3 miles so the car had to be scrapped.
Because most is bad doesnt mean that ALL are bad
Try going over the speed bumps on the way into San Diego from Mexico at anything over 5 mph and see if you can keep your rear axle, ha!
Wonder if that Xantia's the Elk Test-busting 3-litre variant
We have so many different types of bumps though. Would they all affect in the same way?
Well,Citroen's Suspension will always work,no matter the the type of the bump You have. That's why this system is soo incredible and innovative to the whole car industry,yet people refuse to agree to that.
i hit a speed bump at 100 mph -160km/h
on my left there was a river
i thought i ll sleep with the fish that night but surprisingly i almost didn’t feel that:)))
It doesn't matter how it feels in the car, its what damage going over them faster that you should really be concerned about. Going over them faster is going to be harder on the car, no matter what make or model and that's going to get expensive down the road if you keep doing it.
I like the shirt
I drive a Citroen Xantia (2.0 16v). The ride is really smooth, but replacing the suspension spheres every two years or so, does take the fun out a little bit...
Do not replace, refill.
And they are super cheap now. Maintenance is more like every 4 to 5 years. And indeed quick refill.
They should've tried it with the black/yellow mini bumps. Bumps which the suspension can actually completely absorb.
Realistically the best and unfortunately also the most annoying to others following closely is to crawl over them as slow as possible. With less ground clearance, I am forced to do this to avoid damaging contact to the underside of my car. A gradual flowing slope is better than acute angle slopes, as this reduces the severity of the movement. It's easier on the occupants.
Keep in mind that it's not only the suspension that gets the hit from speed humps, but it's also the engine & transmission mounts that deteriorate. The slower you approach the speed humps the better. With speed humps (the narrow & tall ones) the speed should be closer to 3mph/5kph - most importantly approach them without having brakes applied.
Speed bumps have ruined my former car (A Gen 2 Focus Flexifuel), it made weird noises in accelerations after this.
"amazingly" the Citroen was best dealing with bumps?? you cannot use this word any wronger...
How about an average road in Essex? The roads are so bad they don't need speedbumps, but it would be nice to know the optimal speed for the least spinal/vehicular damage...
The length of a speed bump affects the optimal speed of going over it.
Mr Trundle? Are you havin’ a “laaf”?
What, it gets increasingly less smooth of a ride when the speed increases? Who would have thought...
In Brazil all roads are speed bumps. Your car bumps wherever you go!
In the usa if you hit a speed bump at 40+mp your not a car anymore your a plane
As an owner of a car with sports suspension, the average speed I drive over speed bumps is about 5mph.
Brave to take a bump at 45 and 60!!
The ambulance service needs Citroen DS' with their revolutionary hydropneumatic suspension
those bumps man... deadly
I broke the oil sump in my golf mk4 😒
In Mexico we have more agresive speedbumps, the only car i know you can go fast without damage the suspension and be confrtable is the Chrysler Spirit
I love when first world drivers complains on anything, you should try our speed bumps in Mexico City
You should have used the old Lexus with the Bose active magnetic Suspension
I had speed bumps all along my street in Dallas. I would drive over them at about 40 in my Alfa gtv6, at that speed it was like they had vanished. Slower speeds beat the car hard.
I regularly hit the inverse version of these on motorways at 75mph. Potholes. Explans why my wheel alignment is fucked after only 20,000 miles.
Do one at 200 miles!
Please give us the data for all three cars at each speed!!
best way is to drive in normal speed but when reaching the bump move your body away from the back of the seat this reduces the body movement considerably.
Even the Golf was old. The real message of this is that most modern cars have a terrible ride quality and seem to think your spine is part of the suspension system.
1:56 That's my kinda name!
Come to Egypt and see how the speed bumps looks like 😂
In my country that speedbump is called patchwork in road .. the real speed bumps are 3 to 4 times higher than that...
Damn looks like top gear was right about speed humps and ambulances
1:12 I wonder why they don't show data on the Citroën C5..
Italy removed them but you'll still find an odd few forgotten to be removed or simply could have cared to remove it.
But 5th Gear didn’t show the test results of the Citroën Xantia!
I bet it was farrrr better than the rest, not just the best result but by far the best..
These videos always look like they're 9 million years old, I'm not sure if I'm missing out and they're just old videos reuploaded or if they're just easy to make
Try a Citroen 2CV6.
My record is 105 kph for a 25 kph speed hump..
It sounds like he is channeling Rory Bremner doing an impression of prince Charles.
test out peugeot 406
it flies
To be honest, the conclusion is expected. Negotiate them around 15mph. Even if they discovered that 88mph was a perfect speed to negotiate a bump with minimal disruption to your car and body, they would never reveal that.
“Traffic calming measures” are there to deliberately slow down traffic in areas where there is a risk to life. For years, a long road that ran the length of the neighbourhood where my Mum lives, was used as a speed strip. After the introduction of speed bumps, the traffic has slowed. Quite good as there is a school along that road and a couple of churches, with housing on both sides of the road.
Depending on your direction of travel, the bumps approaching the school are shorter and need to be negotiated at about 15mph and as you continue towards the churches, the bumps are longer and can be negotiated at around 20mph.
The beauty of the system is that it is possible to drive the full length of the road at 20/15mph and cover it within four minutes or so. It’s 1.3 miles long. Why anyone thinks they need to cover it quicker than that and risk killing someone is crazy.
It’s also quietened the neighbourhood as the sound of loud exhausts is absent.
Except for the idiots who speed between the bumps -
They are necessary in most situations. Sometimes they may be installed for other reasons, but generally they are there to reduce accidents.