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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

#341
post #287

Earlier quoted context omitted.

So just... let them go. It's easy to do. Escalation usually doesn't improve things, including for the person displaying the universal finger (or throwing the lug nut). You've got a choice: You can keep plodding along in your truck while you escalate and retaliate and get all grumpy and stuff, or just keep plodding along in your truck without any of that noise. The errant, instigating driver won't really learn anythin…

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

#342
post #165

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…

Not only are you less likely to crash -- you're less likely to cause a crash ten cars behind you. This diagram changed how I think about following distance: https://entropicthoughts.com/keep-a-safe-following-distance

I find this diagram _incredibly_ hard to read. I’m pretty sure I understand the phenomenon he’s describing — without safe following distances, car n+1 must break more aggressively than car n in order to avoid a collision, so given a long enough chain of non-safe followers, a collision is guaranteed. But either I am dumber than I’d like, or that plot is terrible.

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

#343
post #281

Earlier quoted context omitted.

Truckers sometimes have a good reason to do that -- they can't brake or accelerate as quickly as a small vehicle, and thus can end up going very slowly if they stick with the right lane. To a driver going 3 exits down the 205 it's not a big deal, to a truck driver doing the same they may be at the end of a long haul up the I5 and every minute starts to count since it can affect their pay. And if you can avoid hard br…

That's not a good reason, those truckers are just assholes. I'd like to see the authorities enforce the law and fine them heavily. Put them out of business.

Driving a truck is more difficult than it seems. They are extremely heavy, very dangerous, be careful around them.

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

#344

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…

Maintaining a safe following distance is incredibly challenging on busy freeways where hard braking is often 'required'. Most people have likely found themselves in this situation: vehicle changes lanes in front of you; you slow down to maintain a safe following distance, another car sees a gap and changes lanes in front of you. Repeat for your entire commute. Incredibly frustrating, and I've driven all over North Am…

Doesn’t happen much in Portland OR, at least before the invasion of homelessness here. We had the most “nice” drivers in America.

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

#345

Aim to make the road laminar. Every time you hard brake, you're causing the milk jug to glug, making a ripple of entropy as momentum turns to heat from your brakes and those behind you, sometimes in perpetuity. I learned this while doing a 1.5hr daily commute in a Subaru with a clapped out manual transmission. I wanted to conserve energy shifting, but realized I was now participating in large choreographed dance of "…

THIS this so much. Look far out ahead and if you see traffic compressing then slow down sooner so as to try to make that compression vanish for those behind you.

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

#346
post #218

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).

It takes almost no effort to restore your safe distance again.

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

#348

Aim to make the road laminar. Every time you hard brake, you're causing the milk jug to glug, making a ripple of entropy as momentum turns to heat from your brakes and those behind you, sometimes in perpetuity. I learned this while doing a 1.5hr daily commute in a Subaru with a clapped out manual transmission. I wanted to conserve energy shifting, but realized I was now participating in large choreographed dance of "…

THIS this so much. Look far out ahead and if you see traffic compressing then slow down sooner so as to try to make that compression vanish for those behind you.

Lube the road.

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

#349

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 because someone is taking your safety buffer as their opportunity to travel faster. And it results in you having to travel slower and slower to maintain the gap that is constantly consumed, tragedy of the commons style, by opportunists.

> as their opportunity to travel faster

You're ascribing motive where you have no data to do so.

> travel slower and slower

Roads near capacity slow down. This capacity surge is typically highly predictable.

> tragedy of the commons style, by opportunists.

People can only drive one car. They cannot drive two at the same time to get there twice as fast. I don't think this logic applies.

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

#350
post #147

Earlier quoted context omitted.

Yah. There's something that feels unjust about it -- the perception that the people cutting are getting something over on you -- that causes us to want to behave badly. But even if 2 dozen people go around you and creep into that following space, you've been cost like 45 seconds at worst. Better not to play the game.

Also, it really doesn't happen that often. I'm that guy following at 3 or 4 car lengths in rush hour traffic and people aren't constantly funneling in front of me. It's a hypothetical "problem" that is bigger in your head than in reality. Sometimes I think it's just people's reflexive scarcity mindset that tells them "that spot must not be that desirable or someone would be in it." Regarding the broader topic of hitt…

I'm that guy following at 3 or 4 car lengths in heavy traffic an people are constantly funneling in front of me, all to go exactly the same speed they'd be going if they were behind me.
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