Quote (kurisutofa @ Aug 31 2020 03:57pm)
Where is the information to back that up? I can find countless articles by the NHTSA and other sources talking about even 5mph slower is more deadly than speeding. You just seem to have stated and opinion with no source of where you got your information from.
its not an opinion at all. all it takes is a basic understanding of data collection, ie. where their data is coming from, how its collated and how it's displayed.
for example, if you actually look at the data that the NHTSA collects, more than 70% of all accidents in the US occur at low speeds. how is that the case? because 71.4% of accidents result in property only damage, ie. the accident wasn't at a high enough speed to cause physical harm to occupants. there are outliers where some asshat goes off the road at a high speed on a back road and damages the car but not themselves, but they're extreme outliers and not a significant data value in comparison to the rest of the dataset. anytime you have an actual collision at a high enough speed, there will be injury in one form or another to occupants, and as speed increases, the fatality rate increases significantly. again, not an opinion, just physics. what this data point shows is that as speed goes down, an accident is more likely to occur. the biggest factor that changes speed is location. the more attention a location requires while driving, the lower the speed so as to offer drivers more time to react to changing conditions. that's how city planning works.
the leading causes of vehicle accidents are distraction, fatigue, intoxication, and aggressive driving. when these factors come in to play, all of them have a significant value in common; the more actions a driver has to commit, the more likely they are to cause a problem. when you are city driving you commit far more actions per minute than highway/freeway driving. you are also interacting with far more drivers than you would on a highway/freeway. an accident occurs when one or more vehicles fails to adjust properly to a change in driving condition.
what these mean is that the NHTSA study you keep talking about looked at which speed brackets drivers were most likely to have an accident. the reality is most accidents happen under 40mph (65km/h) because those are city driving speeds, and the 30-40mph range is the most deadly because that's the bracket that is most likely to involve two or more vehicles travelling at a high enough rate of speed to cause fatalities. which is also why when you go to the brackets that are 5-10mph above city speeds, the accident rates and fatalities drop off significantly; the conditions that cause accidents are far less likely to occur. that is why the 30mph bracket accounts for twice the serious injuries and fatalities than the 60mph bracket. this doesn't mean that going faster is safer. it means that the places where people travel at 60mph are less likely to result in an accident.
all of this is to say that viewing speed as the only factor in what plays into accident rates is pointless and foolhardy. what speed does as a determining factor is tell you where and when accidents are more likely to occur. that's it.