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Hard-braking events as indicators of road segment crash risk

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Re: Hard-braking events as indicators of road segment crash risk

#401

Post by rendall »

ehnto wrote: post #367
crazygringo wrote: post #331

Earlier quoted context omitted.

I don't think you're understanding. The point is that 20 people in a row will take advantage of your buffer to slow you down again and again and again, which makes you get to your destination later... because they're being selfish to get somewhere faster, and you're not so you get to where you're going slower . We're not talking about where they're changing lanes to take the next exit. We're talking about where your…

I understand perfectly, 20 years driving, I think people just don't like that the safe answer is to be slow. You will not fix others behaviour, so your options are be slow and generous, get out of the chaotic lanes (unless that's all of them), or join them and be aggressive, claim space, be stressed and annoyed your whole trip. There is no solution to traffic here sorry, this is more about managing your own frustrati…

I am going to validate what you say here.

Ehto is correct and this is the way. I'll go further and say that if someone is tailgating you and it's pissing you off, generously let them pass. Literally pull to the side of the road if you must.

Re: Hard-braking events as indicators of road segment crash risk

#402

Post by eigart »

presidentender wrote: post #20

I got one of those dongles from my insurance company that plugged into the ODB2 port and reported my driving habits. I was a bad driver. It would frequently beep at me to let me know that I had braked too hard. I was mystified. "What should I have done differently," I'd think, as I raged at the objective machine that judged me so. The next time my brother came to visit, he called mom. "Oh, and presidentender is a goo…

That’s pretty cool. Reminded me of reading [0] about how training surgeons using click feedback, like when you train a dog, works really well.

[0] https://www.npr.org/2018/06/12/619109741/clicker-training-fo...

Re: Hard-braking events as indicators of road segment crash risk

#403

Post by HPsquared »

adw wrote: post #390
apparent wrote: post #382

Earlier quoted context omitted.

It is more dangerous to be slow and have people constantly merging in front of you, rather than be slightly faster and not have all the merging. Accidents happen when vehicles are going different speeds, all things equal.

American road laws are insane here. The law should be simple; you must be in the outside lane at all times unless you are overtaking, and once you're done overtaking, you should merge back into the outside lane. https://www.highwaycodeuk.co.uk/overtaking.html

Confusingly, the slow lane is called the "inside lane" in the UK, even though it's on the edge of the road and the fast lanes are in the middle.

Re: Hard-braking events as indicators of road segment crash risk

#404

Post by ndsipa_pomu »

presidentender wrote: post #20

I got one of those dongles from my insurance company that plugged into the ODB2 port and reported my driving habits. I was a bad driver. It would frequently beep at me to let me know that I had braked too hard. I was mystified. "What should I have done differently," I'd think, as I raged at the objective machine that judged me so. The next time my brother came to visit, he called mom. "Oh, and presidentender is a goo…

I've long thought that drivers should have some kind of black box monitoring their driving habits/abilities with that kind of acceleration sensing. As well as feeding into insurance databases to give safer drivers lower premiums, I think it would be ideal to highlight when older drivers start to lose their faculties. Another big benefit could be to diagnose some diseases early on - if a driver suddenly becomes less smooth, there's a good chance that they have some new eye or brain condition.

Re: Hard-braking events as indicators of road segment crash risk

#405

Post by ndsipa_pomu »

loeg wrote: post #218
Sohcahtoa82 wrote: post #213

Earlier quoted context omitted.

> vehicle changes lanes in front of you; I will never understand why this is so rage-inducing for people. Changing lanes is a necessary part of navigating, even during busy traffic. People on an on-ramp will need to get in front of somebody . People needing to move back to the right because their exist is coming up will need to get in front of somebody . Your lane is not a birth right. Let people merge. > you slow do…

It's frustrating when it eats into your safe following distance. The driver merging in ahead of you is being dangerous and not leaving a safe following distance for themselves (or you).

What's the problem with reducing speed and reclaiming a safe following distance?

Re: Hard-braking events as indicators of road segment crash risk

#406

Post by Mawr »

presidentender wrote: post #20

I got one of those dongles from my insurance company that plugged into the ODB2 port and reported my driving habits. I was a bad driver. It would frequently beep at me to let me know that I had braked too hard. I was mystified. "What should I have done differently," I'd think, as I raged at the objective machine that judged me so. The next time my brother came to visit, he called mom. "Oh, and presidentender is a goo…

Driving predictably and smoothly is good. The only time there should be any braking considered remotely "hard" would be when something surprised you, which should almost never happen.

Re: Hard-braking events as indicators of road segment crash risk

#407

Post by Mawr »

RupertSalt wrote: post #30
WarmWash wrote: post #29

Earlier quoted context omitted.

If you take a seasoned motorcycle rider and put them in one of those dashcam subs, they'll rip their hair out. Most people have near zero defensive driving skill, and view someone pulling out in front of them as "nothing I could have done", when the dashcam shows the offending driver showed 5 signs of pulling out ages before the accident occurred.

A seasoned motorcycle rider should be unable to rip out any hair, due to safely wearing a helmet!

A helmet is priority #100. If your helmet ever comes into play, you've fucked up so bad it'll probably not help you much.

Re: Hard-braking events as indicators of road segment crash risk

#408

Post by taneq »

ehnto wrote: post #367
crazygringo wrote: post #331

Earlier quoted context omitted.

I don't think you're understanding. The point is that 20 people in a row will take advantage of your buffer to slow you down again and again and again, which makes you get to your destination later... because they're being selfish to get somewhere faster, and you're not so you get to where you're going slower . We're not talking about where they're changing lanes to take the next exit. We're talking about where your…

I understand perfectly, 20 years driving, I think people just don't like that the safe answer is to be slow. You will not fix others behaviour, so your options are be slow and generous, get out of the chaotic lanes (unless that's all of them), or join them and be aggressive, claim space, be stressed and annoyed your whole trip. There is no solution to traffic here sorry, this is more about managing your own frustrati…

The issue is that when you slow down, you’re (a) creating ‘turbulence’ in the traffic flow with increased speed differential between cars and increased lane changes, which increases accident risk for everybody, and (b) it’s not even solving the problem because you still perpetually have some impatient driver wedging themself in directly in front of you, deleting your buffer zone.

It’s safer to drive a little closer, keep up with other traffic and defend what gap you can in front of you.

Agree with your conclusion here, though. The best response is to simply not drive in this kind of traffic.

Re: Hard-braking events as indicators of road segment crash risk

#409

Post by Mawr »

amanaplanacanal wrote: post #57
AngryData wrote: post #39

Earlier quoted context omitted.

It does cost them just to process the claim because the other guys side is unlikely to completely roll over if there is any chance to reduce the payout. Obviously its not as much as the claims themselves but it also isn't free.

Yep. I have a friend that was plowed into from behind while waiting at a red light, twice within a few months time. Two separate intersections. Totaled her car both times. Her insurance rates went up, even though she was clearly not at fault.

"Not at fault" as far as the law is concerned, is a low bar. If you're one of the last cars in a queue, you should be checking your mirrors for exactly this scenario. Throwing your hands up in the air saying "well the law says I did no wrong!" isn't the way. Unless you like getting into accidents.

Also, having two of the same type of accident twice in such a short time is so improbable, that I'm seriously doubting your friend. I'd say it's way more likely she braked too suddenly or has other bad driving habits that make such accidents more likely than that she got this unlucky.

Re: Hard-braking events as indicators of road segment crash risk

#410

Post by Mawr »

alwa wrote: post #17
harshaw wrote: post #2

Nice research. This is fairly well known in insurance circles. Most auto insurers that do telematics consider hard braking the strongest indicator of risk. One of the things that we do at work (Cambridge Mobile Telematics) is build tools to deal with this risk. We have apps that monitor driving and we play a tone to indicate that a hard braking event was detected. Simply letting people know that they had a hard braki…

When you modify their braking behavior, is that enough to improve their overall driving behavior? Or do forward collisions and rear-enders make up substantially all of what the driver can control, so training the behaviors to reduce that type of near-miss reduces the driver's overall crash risk? To the point that it's similar to the safest tranche? Is it that hard braking events are broadly indicative of surprises of…

> Is it that hard braking events are broadly indicative of surprises of lots of sorts,

Of apparent surprises to the driver. And since actual, factual surprises are extremely rare, if a driver is regularly being surprised, they're a bad driver.

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