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Grade Crossing Accident in Houston Kills 4 Teens
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<p>Anything that tears off a roof is speeding.</p><p>I have never seen destructive accidents at 40mph or below UNLESS the vehicle loses the pavement and gravity takes over for the big drop off the bridge or whatever. Usually in my experience they will run under and through the decpitation barrier of a semi trailer and have thier heads chopped off at the neck and lose a substantial part of their roofs in the process. Not that any of that matters.</p><p>At 80 mph you are going to require about... 2 seconds to see, understand mentally the hazard, make a decision and react, another 1 to 3 seconds for the brakes to take hold and 3 more seconds for the physics of the stop to work out considering the factor of traction, availible braking horsepower, pavement condition, tires, mass of vehicle, speed etc etc etc. Basically you need about 8 seconds to stop. I can bring a 40 ton vehicle to a stop in under 10 seconds but need ALOT of room to do it.</p><p>For a car, 60 to zero is anywhere from 110-150 feet distance and at night you dont even have that much to see much less react in time to make the stop happen.</p><p>Im betting that the skid marks in question is a hell of alot closer to that big bad railcar than 150 feet.</p><p>I have personally witnessed cars totally destroyed by extremely high speeds while the drunkard staggering around going "Ow that hurt" is being chased down by angry paras who want to slap gauze on his cuts.</p><p>There is a whole set of work called "Accident investigation" that will run it's course and can probably reconstruct the speeds involved.</p><p>Reading the chat, the community weights against the children sneaking out against curfew rules at night. Apparently that is far more important than the actual wreck itself.</p>
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