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I did a anti-slip course where we learned dosed breaking to reduce break distance. And once a circuit racing course where the instructor just told me to break with all force available.

The latter stuck. This instructor logic was, only if you are a pro driver you actually can outperform ABS. In emergency situations I break with full force without hesitation. This has lead to multiple avoided crashes and TBH two back collisions. Once I pushed so hard the break light sensor had to be replaced. In that case I saw a SUV struggling to stop in my rear view mirror. I had enough control to move to the right and have that SUV crash into the vehicle in front of me.

In this line of thought, it can be life saving to be overweight. I was about 120 kg back then and therefor had quite strong legs.




> In that case I saw a SUV struggling to stop in my rear view mirror. I had enough control to move to the right and have that SUV crash into the vehicle in front of me.

As this example of yours shows, a key benefit of ABS (if you're not a professional driver) is that it allows you to steer as well as brake, by preventing the wheels from locking). IIRC studies have shown that the majority of accidents cannot be avoided by braking alone even with an optimal stopping distance; you need to be able to steer as well.


This.

In advanced driving lessons, in both dry and snowy conditions, goodn driving instructors not only acknowledged but demonstrated, it is POSSIBLE to break better than ABS. But in an uncontrolled, unanticipated emergency (where you don't necessarily get to pick your breaking point and posture etc), ABS gives you steering control. It takes practice to utilize that ability, mostly people just focus and fixate in the obstacle ahead of them they are trying to not hit. But the miraculous, magical ability to steer with ABS is an absolute life saver.


> mostly people just focus and fixate in the obstacle ahead

Indeed! Forgot all about my takeaway #2 of the course, thanks for reminding me. People tend to focus wrong in an emergency. Look further ahead, get the bigger picture otherwise you actually steer toward the collision as a self fulfilling prophecy.


"In emergency situations I break with full force without hesitation. This has lead to multiple avoided crashes and TBH two back collisions. Once I pushed so hard the break light sensor had to be replaced."

I think full braking should be part of driver training. A lot of people I know are very hesitant to brake full force and I think a lot of accidents happen because people don't really brake all out when needed.

As far as driver training goers, a little training in sliding would also be very helpful so people know what to do when the car has understeering or oversteering.


Shortly after buying a car, I always go a large, empty parking lot late and night, get up to about 30 mph and stop as hard as I can. I want to understand what it feels like before I get into a panic situation. I only buy a car every 10 years on average, so it's interesting to see the progress in braking. My current car (a 2014 model) stopped so quickly and so violently that it frightened me. Everything not tied down in the car was flying around. I thought I must have hit something, but I didn't. I did a few more such stops to try to get used to it. It still makes my heart race, but at least I know to expect it.


The vibration in the brake pedal can also be surprising to drivers who haven't triggered ABS before. And it can vary quite a bit depending on manufacturer and age of the vehicle.


What are you planning on getting next year?


GP didn't say they buy a new car every 10 years.


That's right. I'm hoping to get another 10+ years out of this one. It's up to 165K miles, and I hope it lasts beyond 300K. My wife and I only have the one car despite living in a rural area and it fits our use cases perfectly.


Sorry, I read it as every 10 years.

Agreed on the lowering of consumerism.


Similarly, when it snows I like to find a parking lot and practice a few skids before I drive any real distance.


Depending on where you live, if it's been awhile since it rained and then you get a downpour, test traction before driving off.

Doesn't need to be anything serious but it can bring oil/etc to the surface and it's good habit to be feeling what you're driving.


Bravo! More drivers should do this. It's also how I was taught to bed new brake pads and rotors, so it might actually have been good for your car.


> I think full braking should be part of driver training

I thought it was. I distinctly remember my Dad telling me to slam on the brakes while teaching me to drive. I pushed them hard, but nothing crazy. He said to get up to speed and kick the pedal through the floor and hold it there.

Older car, full lockup and skid for a good distance. We did that more than once.

Now 25 years later, I do exactly the same thing every year at the first snowfall , and a few times during the winter to get the feel of everything going extremely vague.


It definitely is as part of the UK driving test, though they normally tell you it's coming up and intentionally take you to a quiet back road and make sure it's completely empty first. In my test the instructor told me to keep driving until they wacked their clipboard on the dash, then I had to STOP as quickly as possible, and you'd fail if you didn't apply heavy brakes quick enough. And as this is common in the test it was gone over a few times by my instructor to prepare.

Though they also checked the car I was using had ABS first, they might have had a slightly different process otherwise? Though in the UK it's common to have a professional driving instructor with their own car you'd use for learning and borrow for the test, so there was likely an expected minimum age and spec of car people were doing their tests in.


It used to be a mandatory part of the UK driving test. Now it's one test out of three, so you can skip preparing it and just retake your test if you get unlucky.


~10 years ago they said they "may" do one, but every one of my friends was required to. I guess it might have changed since then? Or location dependent - I know different areas have different roads, in a reasonably-sized UK city (top 20 by population) the local instructors generally knew the 4-5 routes the local DVLA normally tested around, and intentionally practiced in those areas with the specifics they entailed. And speaking to people who tool their test in different cities the things that tended to be difficult and likely to catch them out were often different.

And having done the California driving test a few years back as well, comparatively the US one was pretty trivial in comparison. And I've heard the CA test is one of the harder ones in the states.


> ~10 years ago they said they "may" do one, but every one of my friends was required to. I guess it might have changed since then? Or location dependent - I know different areas have different roads, in a reasonably-sized UK city (top 20 by population) the local instructors generally knew the 4-5 routes the local DVLA normally tested around, and intentionally practiced in those areas with the specifics they entailed.

Test instructors are told they should carry out the emergency stop on one third of tests at random, and that was the guidance at least as far back as 13 years ago ( https://www.adicpd.co.uk/dsa-dt1-standard-operating-procedur... has a copy from 10 years ago, see page 40). A FOIA response I saw showed numbers that align with that, so unless some instructors are doing the emergency stop and then falsely reporting they didn't...


> I distinctly remember my Dad telling me to slam on the brakes while teaching me to drive.

Same when my mother taught me to drive. She even took advantage of rainy days to take me out to a large empty parking lot and we practiced how to deal with hydroplaning.


What's interesting to me is that in emergencies, apparently many people don't brake hard enough.

So now they've created brake-assist options that try to determine when such a case is occurring, and slam on the brakes as hard as the car is able.

As incredulous as that sounds, it's apparently improved overall safety.

From what I've read the tech has been around since the 90's but has become much more standard.


> What's interesting to me is that in emergencies, apparently many people don't brake hard enough.

I did the Mini Stunt Driving Course the other week in Palm Springs. One of the first things they cover is emergency braking. Even in that situation — not an emergency; the whole point is to stop the car as fast as possible — I had trouble overcoming the urge to NOT brake as hard as I could. It took a few runs for me to get myself to stand on the brakes properly.


I’m pretty sure half the problem is that people can’t even _get_ the brake pedal to the floor.

When I get in a car and need to adjust the seat, I slide my butt to the back of the seat and push the brake pedal all the way to the floor. What I’m looking for is being able to have it on the floor slightly before my knee locks and without my foot needing to leave the floor (i.e., not lifting my foot up and pushing with the tip of my toes or something).

I know that I can apply 100% braking force. If I were much further back I could not.

I often get in the cars of people 6”+ shorter than me and… don’t need to slide the seat back. I get in cars driven by people around the same height as me and need to pull the seat forward. My wife is one example—she’s around 4” shorter than me and when I drive her car I keep the seat in the same position she does.

It’s a pet theory that the majority of people driving on the road day to day have their seat positioned so they’re actually physically incapable of braking with full strength.


I've never been in a situation where I didn't brake hard enough, but I'm a little surprised that's possible.

I figured the amount of pressure required to lock the wheels was fairly minimal.


On modern cars with ABS you can’t lock the wheels, can you?


You can't.


There are a lot of knock-on effects.

For instance, a lot of drivers prefer to swerve rather than brake ... because they're afraid of getting hit from behind, because everyone is tail-gating.


For this precise reason I like to drive with tons of buffer to the car ahead. Given the fact that I am usually in a sports car, I know I can brake much faster than most people around me. Should I need to come to a complete stop, I can control the braking distance to make sure the cars behind me are not only aware that I'm coming to a full stop, which gives them the time/distance they need to brake, but it also gives me time to react to them should they fail to see me slowing down (not paying attention).

An added bonus is that most of time the impatient drivers will just go around me and I don't need to worry too much about tailgaters.


> An added bonus is that most of time the impatient drivers will just go around me and I don't need to worry too much about tailgaters.

I so wish this were more true; I've been tailgated for 10s of miles in the right lane on a freeway with light traffic that was never fewer than 3 lanes for the entirety of that distance.


When I've encountered this, I've just taken my foot off the accelerator and let the car gradually lose speed. Eventually, the person behind loses patience and passes me angrily.


Yep, it's always better to put the car behind you in a non-accelerating frame before they slowing down is required.

Honestly I would love for tailgating to have automated enforcement with each ticket doubling in fines. In a few weeks we'd weed most of the bad drivers off the road, and at least in my imagined scenario road safety would increase dramatically.


Wind your window down, stick your hand out, and gesture for them to pass.

It works most times I've tried it.


I've had mixed success with honking.


This might be a little too far, but I sometimes say to my friends that a minor crash should actually be part of driver training. Modern cars feel extremely safe, and nearly drive themselves, so many people do not take driving as seriously as they should, and not as seriously as they do after they have their first collision.

Perhaps being required to actually use 100% braking power to pass is enough :)

In this respect, motorcycle training courses are MUCH better, and have numerous braking and swerving drills, but they have to be, because motorcycles require a higher-level of attention and are significantly more dangerous to operate than a car.


> because motorcycles require a higher-level of attention and are significantly more dangerous to operate than a car.

For the driver. Cars are more dangerous than motorcycles for everybody but the people inside/on it, which means that swerving and braking exercises are actually much more necessary for car drivers than for motorcycle riders


Weight is the winner at equal velocity.

This said, I prefer my mode of transportation to have a hard crunchy outside to protect my soft gooey insides.


In this respect, motorcycle training courses are MUCH better, and have numerous braking and swerving drills, but they have to be, because motorcycles require a higher-level of attention and are significantly more dangerous to operate than a car.

Then why does almost every motorcyclist I see ride dangerously? They all follow too close. Many will spill over into the oncoming traffic lane to overtake something in their own lane, just expecting you to move to the shoulder so they can go the wrong way in your lane.

Later I see them stopped for fuel or food and it's all grey haired dudes.


Maybe those motorcycle training courses have become so strict that young people don't bother, and most of the bikers you see are those "grey haired dudes" who learnt back when standards were lower.


My driver's education in Colorado included going out on a frozen lake and practicing counter-steering into a slide, as well as a sense of how cars behave in slippery conditions. Very good skill to have for icy mountain driving.

You can also find an empty parking lot after a snow storm and do donuts for "education". Just avoid light poles ;)


Same, for the "education"! In my hometown, lakes and rivers remained frozen for half the year. There were two such lakes separated by narrow dirt trails through the trees. Each winter, some kind soul went out there with their plow and created a drifting course that snaked around one lake, through the woods, wound around the other lake, and back. We'd take whatever vehicles we had access to and race there at night. I'll never forget careening around that track with the windows down, snow blowing in, music blaring, swerving around my friend's mom's minivan and trying to fend off another buddy in his rusty Toyota pickup.

I like to think we became safer winter drivers as a result.


“ You can also find an empty parking lot after a snow storm and do donuts for "education". Just avoid light poles ;)”

Me and my friends did this for hours after each snowfall. Great training. One of my friends hadn’t heard of your light pole advice and mangled his Golf GTI pretty good.


I got into my one and only accident less than a year after getting my first car, when another driver ran a stop sign. I was the one who tee-boned them, because they actually accelerated quite quickly out of the stop while I was going about 50 mph with right of way on a feeder road. I still can’t shake the feeling that I under-braked, although I did see some solid tread marks before the point of impact on the road. I don’t think it was a very avoidable accident on my part, but I probably could’ve hit them with less speed if I’d put all my weight on the brake. My back would certainly have appreciated it.


Without knowing the conditions, since you seem to be asking for internet quarterbacking (please feel free to ignore if not)...

Braking harder may have also applied maximum braking sooner, or you may have been able to get tread marks on all wheels instead of only some wheels.

Also, as a more experienced driver, I definitely have fewer expectations that other vehicles will stop when they're supposed to. If you had visibility of the vehicle before it blew the stop sign, you may have been able to predict and slow down sooner or take evasive action.


>I think full braking should be part of driver training.

Also if you lose brake assist. I've read a handful of "out of control car" stories where the driver reported the brakes didn't work. Well yes, without power brakes it feels like stepping on a piece of wood. You need to apply a LOT of force to stop a modern car without power brakes, "putting both feet on the pedal and pushing with everything you've got" a lot. Bending the brake pedal is better than crossing into oncoming traffic.


Talking about "brakes didn't work" it always terrifies me when I see people just flying in heavy rain. I've done intentional hydroplanes in closed areas and even when you know it's coming it can be hard to resist the urge to panic.


>I think full braking should be part of driver training. A lot of people I know are very hesitant to brake full force and I think a lot of accidents happen because people don't really brake all out when needed.

Couldn't agree more. It's beyond negligent that with the current state of drivers ed the first time a driver will need to emergency brake, or even feel abs activate will be in a potentially life or deal situation.


Nowadays it would make sense for most people with ABS to learn "full braking" but people still need to know if they have ABS or not, because full braking is dangerous without ABS. Unfortunately, I think 99% of drivers, including those in older cars without ABS, aren't really sure what ABS is.


My teacher made me do a full force brake during my training. It was more intense than I had anticipated, and my teacher forgot that he still had his sunglasses on his head, which promptly smashed into the windshield :D


But it also requires some resolve when the abs starts pushing back on the pedal. The instinct is to lift your foot instead of fighting the pedal, which is what you should do.


With brake-by-wire, is this even necessary? I thought that ABS feeling occurred because the brake pedal was connected to the master cylinder, but isn't necessarily desired.

My bike definitely pulses the brakes in a way that you feel on the controls, but they are directly connected to the hydraulics.


Oh sorry, this was my experience in 20-30 year old cars, they push back, so you need a firm hold on the brake.


No don't be sorry, I'm mainly curious if they still had the same feeling. I don't know the last time I had to brake hard enough to need ABS in the car, if they still had that feeling, or even if my car has brake-by-wire.


I don't think your car has full brake by wire. You should be able to operate the brake (to some extent) even if the car systems are not fully working.

I also learnt that teslas (at least the 3 and y) don't do steer by wire so when you play the games using your steering wheel you so turn the wheels a little bit.


I don't think brake by wire is legal in the US. Don't know about other places.


The instinct? I've never had that instinct since I've never driven a car without ABS for any extended period of time.


Right, but if the pedal suddenly starts pushing back, are you naturally expecting that? I was involved in three collisions where I failed to stop in time, and all three times the pedal pushed back. I didn't really expect it the first time. Talking about 90s and early 2000s cars, so not brake-by-wire.


>Right, but if the pedal suddenly starts pushing back, are you naturally expecting that?

Under hard braking conditions? Yeah. Especially since we have quite a lot of snow and ice here every year, you do sorta get used to the ABS feel and crunching sound.

I once had a close encounter on snow where some idiot came way too fast a downhill and slid onto my lane. Pretty sure I kept my foot planted on the brake while going as far right as there was road there.


Geography matters; there are people who came of age during the recent western drought that have driven a total of less than an hour in rain; my wife (who grew up in California) first drove in the snow in her late 20s.


I’d it normal for cars to do this? Never experienced my break Paddel to push back.


Have you tried slamming the brakes to avoid a collision? It's not something that happens in normal braking situations. Also, not sure if it's a thing on most modern cars.


I‘ve certainly done it, both on the street as well as in training settings.


I’ve definitely felt this when hydroplaning in Houston


In a modern (<10 year old) car I question the "pro driver" result. I've been looking for data on this, and haven't seen anything that says this is true, but have seen the opposite.

In the past, this was likely true when ABS systems weren't able to control individual wheels. They can do that today, can check for wheel lock-ups and react dozens of times a second, and can therefore compensate for changing grip at different parts of the road during the entire stopping process.

In formula 1, where ABS has been banned, drivers have the capability to manually adjust brake balance (front/back and left/right) which they can do for each corner - so in this scenario it is true but only because they are given an advanced control, practice it over and over for the specific corner, and aren't allowed to use ABS to begin with.


> In a modern (<10 year old) car I question the "pro driver" result. I've been looking for data on this, and haven't seen anything that says this is true, but have seen the opposite.

There is an old SAE paper published by Chrysler that I can't find at the moment. IIRC, it was published in 1968 or 1969, and evaluated their new all-wheel[1] ABS system (later to be sold on the 1969-1973 Imperial).

The gist of it is that on most surfaces relevant passenger cars, ABS gives somewhat ~shorter~ [Edit: longer ] stopping distances but the difference is minimal compared to a trained professional driver, and both are significantly shorter than locking the wheels (what a non-pro is likely to do in a panic situation)

On ice, locking the wheels produces stopping distances that are several times greater than threshold braking. Wet pavement (especially asphalt) is better for ABS, too, though not as extreme as ICE. Importantly, threshold braking also enables the driver to maintain directional control on all surfaces, especially when the left and right wheels have different amounts of traction. ABS enables the driver to concentrate on steering while the computer adjusts the brakes.

However, on dry concrete, as well as gravel or snow, locking the wheels does produce somewhat shorter stopping distances. (Concrete tends to be aggressively textured, almost like sandpaper; gravel and snow can build up a "ramp" ahead of a locked wheel)

The only problem with locking for emergency stops is that 1) you wear the tires down to the cords after about 10 such emergency stops from 60 mph on dry concrete; and 2) the vehicle tends to spin. If the driver should happen to back off the brake pressure while partially spun, the vehicle will depart the road before they can react... so if you're going to lock the wheels, you have to really commit to it.

[1] Chrysler had 4-wheel ABS 10 years before Mercedes' "first car in the world with 4-wheel ABS", but Chrysler had computer logic to release brake pressure on both rear wheels if either one slipped (it had sensors in both rear wheels), which is how Mercedes was able to claim a "first" with their system that simply treated both rear wheels independently.


> on most surfaces relevant passenger cars, ABS gives somewhat shorter stopping distances but the difference is minimal compared to a trained professional driver*

Hm. This [edit: the "shorter", which has now been corrected] doesn't fit my experience when I took advanced driver training years ago (I was a GM employee at the time). The training vehicles could have ABS enabled or disabled by a switch on the dashboard. The instructor first disabled ABS and had me practice threshold braking, until I reached the point where I could negotiate a setup with cones where you had to swerve left, then swerve back right, all while braking enough to not overshoot. I was able to do that several times with threshold braking after some practice.

Then the instructor turned the ABS on and had me try the cones again. I overshot every time.

Of course this was some 20 years ago, and more recent ABS systems might do better. But the SAE paper you refer to was even earlier.


> Hm. This doesn't fit my experience when I took advanced driver training years a

Yup, that was a typo, see edit.


Depart the road means flip?


This video is about motorcycles, not cars. Also, the data on this is in the linked video - the author demonstrates you can do a controlled stoppie to decelerate faster without ABS, because that's its main feature - preventing you from flying off the bike.


I've seen the video, but the comment I'm replying to seems to be referring to a car driving course.

I'm a little surprised there's no "pro ABS" for motorcycles which allows you to do a stoppie if you enable an option, and/or are keeping the bike perfectly straight.


There is, that specific bike has it and it's really close to the best performance you can get as an expert. But it's not very common


>In this line of thought, it can be life saving to be overweight. I was about 120 kg back then and therefor had quite strong legs.

people that lack the ability to lock the wheels on their vehicle on-demand shouldn't be driving it without aids.

it's exclusionary, but even as a paralyzed person who is mandated to use hand controls for throttle and brake it was expected of me to demonstrate that I could leverage enough force on the brake pedal to initiate lock-up in a timely manner -- and modern cars with power-assist brakes should have little problem doing so.


I found a lot of humor in your anecdote that the light sensor had to be replaced.

In a similar vein, a family member had a hardware issue in their laptop where some keys would not register some of the time (moisture). Their understanding was that they did not press hard enough for the device to register the press. This confusion between the boundaries of electronic and mechanical problems led to some mocking.

If your anecdote can be taken at face value - they could find some respite in the fact that by pressing the keys too hard they could damage some peripheral electronic parts.


I can dig deeper behind my face. It was a Volvo 850. After the incident the brake lights kept on. I had to repair the car twice. The first responding mechanic had a single sensor that sort of fitted. A few days later I had my regular mechanic replace it with the stock double sensor. IIRC this model has one sensor for the brake lights and one for the cruise control.


When driving a car with ABS, all-out braking is the best option. You'll get the quickest, safest stop.

That same strategy doesn't work as well on a motorcycle equipped with ABS as you still need to preload the front tire before applying full braking power. As the video shows, this minimizes your stopping distance. Like a car, once you're fully on the brake then stay on it - the ABS system will take care to prevent wheel lockup and skid.


> only if you are a pro driver you actually can outperform ABS

I'd imagine even then, this only applied 20 years ago when ABS was still relatively primitive. I've had only triggered the ABS on my ~2015 car a couple of times but I don't think I could have done significantly better than it even in a non-panic situation.


I got really good at pumping the brakes (is that "dosed braking"? new term to me) in the days before ABS.

You can definitely get close to the performance of ABS with practice. Used to practice in the snow, in empty parking lots. (ABS or no ABS, everybody should safely practice recovering from spins and slides in empty parking lots! It's also really fun...)

The idea that a pro could outperform ABS is surprising to hear. I guess one area where a pro could outperform ABS is if you are trying to slow, not stop. All the ABS systems I've used seem to assume you're trying for a full stop.

Anyway, I'm really glad we have ABS now.


I believe the term "pumping the brakes" refers to applying and releasing pressure on the brakes. With ABS off, a tire that's locked up (not spinning) will stop in a significantly longer distance than one that's at the limit of grip (slipping with a slight under-rotation).

Assuming you have exceeded the limit of grip of the tires with the initial brake bite and the tires have started to lock up, by releasing and reapplying pressure you allow the tire to spin up again to regain grip and then apply more brake to help stop the car. I assume this was to kinda emulate what ABS is meant to do (albeit much slower?) but I never knew this was a thing until recently.

You do not need to pump the brakes if you can threshold brake, though I understand the fact that the vast majority of drivers on the road cannot do this and ABS is a life-saving fallback.

Also to add to your comment about everyone taking some time to practice. I would also 100% recommend a good racing simulator if you or a friend you know has one. Specifically a setup that has a load cell braking pedal. Most entry-level sim pedals are potentiometers which measure the distance your foot travels as opposed to a load cell which measures the force applied on the pedal. This is how my younger self learned to threshold brake (among other things) and I was surprised at how it all transferred to the real world when I finally hit the track later in life.


Amusingly, a loadcell is in fact a very precise measurement of how far something has travelled in response to a load. More specifically, a resistor changes value very slightly as it is compressed or expanded. If you laminate a resistor to a strip of metal, you can use that change in resistance to measure the deflection, and then derive the force that drove that deflection. In principal you can get the same information with a lever attached to the same strip connected to a potentiometer; indeed, lever scales based on amplifying the deflection like that used to be universally used.

Source: I was a loadcell technician in a previous life.


That's really cool and informational. Thanks for posting that.

And yeah, pumping the brakes was essentially the "manual" version of ABS. Depressing and releasing as rapidly as possible.


Prior to commonplace ABS in cars, pumping the brakes when traction was bad was a commonplace braking technique taught across Canada for winter driving. An added benefit was that the sudden, irregular flashes of brake lights ahead hopefully gave a good amount of warning to following drivers to let off their own gas pedal and do the same kind of brake pumping.


> I got really good at pumping the brakes (is that "dosed braking"? new term to me) in the days before ABS.

I always understood the term was cadence braking; that might be UK terminology though.


nit: "brake" (stopping force), not "break" (damage)




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