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Make it make sense

Scheduled Pinned Locked Moved Lemmy Shitpost
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  • the_picard_maneuver@piefed.worldT [email protected]
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    wrote last edited by
    #181

    There are phantom traffic jams where someone breaks hard and it ripples on for ages. You can see on YouTube.

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    • socsa@piefed.socialS [email protected]

      Hey I studied this in grad school for a bit, and it really is just "someone does some dumb shit which leads to a cascading wave of additional people doing dumb shit which propagates backwards for miles." Basically when the offered load is getting close to the maximum load, all it takes is one person aggressively changing lanes to throw that section of highway into gridlock, and it will remain that way until the total integrated traffic flux across that incident boundary again falls below the critical offered load inflection point.

      Basically, pick a lane and just stay in it. Maintain proper following distance. Counterintuitively, the following distance should be for the speed you want to drive, so even in traffic it should be like 5+ car lengths even though you are going slow. This is because it reduces the offered load, and once that number falls below the critical point, speeds will increase again. Bumper to bumper traffic basically prevents that from happening because it dampens the ability for a "speedup" wave to propagate.

      Of course this is all impossible for humans. All it takes is a few idiots to throw off the balance.

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      wrote last edited by
      #182

      Sad thing is its more than just a few idiots.

      The idiots are the majority. So stupidly self absorbed they constantly screw themselves over trying to "get theirs".

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      • F [email protected]

        This is why I thought that maybe it would be good to have some kind of pacing cars, e.g. operated by traffic police? I.e. when you already know or can anticipate that there is a large jam building up, you bring in one pacing car on every lane at an appropriate low speed and everyone has to adjust, so the thing you mentioned won't happen.

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        wrote last edited by
        #183

        The problem with that is people would still do the same stupid shit behind the pace cars which would just cause the same issues.

        The only way traffic pace cars would work is with better fundamental training (and enforcement of that training [meaning cops would actually have to regularly ticket people for tailgating]).

        Especially here in the usa there are hardly any barriers to getting/keeping your license.

        There is a massive amount of drivers who either shouldn't be on the road at all or with heavy restrictions like not allowed to drive at night, not allowed on the highway, not allowed to drive certain classes of cars (kinda like other countries do for motorcycles because there is zero reason for any joe schmoe to just be able to legally get behind the wheel of something like a supercar on public roads)

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        • H [email protected]

          Californians te the worst drivers in the world because none of them understand this simple concept. Every day I’m driving, I give more than enough space in front of me for someone to cut me off and I don’t have to brake. It’s simple. However, I’m constantly getting people riding my ass. Switching around me. And being over all menaces just because I’m leaving a roper gap between myself and the car in front of me. It’s wild.

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          wrote last edited by
          #184

          When idiots ride my ass I slow down.

          Im driving the speed limit in the right hand lane and you ride my ass - I let off the gas to the minimum speed (here its usually 45mph)

          Im actively passing in the left lane and you ride my ass I let off the gas.

          When the idots back off I speed back up. If they start riding me again I slow back down. After a few times of this they usually pull their heads out of their asses and back off/ properly change lanes.

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          • remembertheapollo_@lemmy.worldR [email protected]

            I find it’s the speeders, tailgaters, and the infuriating few that can’t seem to manage to go at the prevailing speed that cause the waves in traffic. The rest is structural - merges, construction, lane reductions, etc. The aforementioned all cause the slowdowns because they move quickly, traffic tends to follow, and end up constantly hitting their brakes riding the ass of the slower traffic. That starts a wave that ends up with traffic stopping when density is high enough.

            You can’t control others moving slower than you want, bitching about lane campers changes nothing, but managing a speed/spacing that allows little or no braking does wonders to keep things moving. If only people would bother to do so.

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            wrote last edited by
            #185

            I used to say "Speeding gets you nowhere, fast" but the irony is lost on anyone that does it.

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            • B [email protected]

              I’m a little confused about the mechanism of the speeders causing the disruption. Is it because when they cut in front of someone closely, it causes the driver to hit the brakes to make more room, thus triggering the chain reaction?

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              wrote last edited by
              #186

              Thats a big part of it, yeah. Theres lots of really good comments about it in this thread.

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              • D [email protected]

                You are incorrect. You are the cause of the traffic jam lol, literally.

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                wrote last edited by
                #187

                Why is Driving Slower than Other Vehicles Just as Dangerous as Speeding? https://share.google/U82ugU39Gc0XOa55G

                A Few Slow Drivers Increase the Number of Accidents https://share.google/SUYjn8eEkNNLe5xBO

                Slow Drivers: Dangers of Driving Slow | Allstate https://share.google/7GP2waFViHMUqEJYj

                Some times you people don't even know what you're downvoting.

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                • the_picard_maneuver@piefed.worldT [email protected]
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                  wrote last edited by
                  #188

                  The Mythbusters did it! They couldn't even get up to speed to begin the first experiment because the traffic jam formed naturally.

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                  • socsa@piefed.socialS [email protected]

                    So an entire third of the road is basically left empty so people can speed?

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                    wrote last edited by
                    #189

                    Yes? You arrange the fastest cars at the front and the slowest cars at the back, and the whole blob of traffic spreads out.

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                    • R [email protected]

                      The Mythbusters did it! They couldn't even get up to speed to begin the first experiment because the traffic jam formed naturally.

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                      wrote last edited by
                      #190

                      Hm, this video isn't available in my country.

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                      • M [email protected]

                        Why is Driving Slower than Other Vehicles Just as Dangerous as Speeding? https://share.google/U82ugU39Gc0XOa55G

                        A Few Slow Drivers Increase the Number of Accidents https://share.google/SUYjn8eEkNNLe5xBO

                        Slow Drivers: Dangers of Driving Slow | Allstate https://share.google/7GP2waFViHMUqEJYj

                        Some times you people don't even know what you're downvoting.

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                        wrote last edited by
                        #191

                        Are you trying to suggest that driving at higher speeds is safer than driving at lower speeds? Because that goes against the laws of physics

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                        • D [email protected]

                          In the case of traffic, keeping a larger following distance can quite literally solve the stop and go break waves that occur…

                          Trying to race ahead and get ahead by one car at a time makes the problem worse.

                          That’s all this is saying.

                          You can not solve the problem ahead of you, you can only affect the traffic behind you.

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                          wrote last edited by
                          #192

                          And you're in one lane of like five going in the same direction.

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                          • D [email protected]

                            Are you trying to suggest that driving at higher speeds is safer than driving at lower speeds? Because that goes against the laws of physics

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                            wrote last edited by
                            #193

                            That is exactly what I'm suggesting. And so are the sources I provided.

                            But let me be clear. People who go slow on purpose in high speed areas are a danger for people trying to go faster. I'm not taking about people speeding recklessly. I'm talking people going 60 in a 70 or 20 in a 35. They cause other drivers to maneuver around them which could cause a situation.

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