I was told in my drivers ed class that there are no such things as car "accidents." There is always a cause to it.
More correctly put, they are car crashes; this, again, is what I learned in drivers ed.
I may "speed" by definition, but only only doing so in keeping up with the flow of traffic. I try never to speed in inclimate (bad) weather conditions.
I also think the usage of 'speed' is somewhat confused. Is it "Oh, do you speed?" or "Do you drive over the speed [limit]?" One of those statements, to me, implies that someone might be speeding (high speed), versus, say, a higher speed conservative that of the posted limit.
Is one 'speeding' when going to pass a slower car? I guess they essentially mean the same thing in words, but it sounds different in the way they are used. I hope someone gets what I am trying to say.
Also, on a more scientific note, there was a dateline or (20/20)? program a while back that showed how 'speeding' cannot be helped by humans. In the dark or in the fog (or any bad weather for that matter in the dark), our perception of speed is impaired because the part of our brains that computes speed isn't working at speed itself. This speed sensor operates on the rate of the pulses of light that your eyes see.
For example, in broad clear daylight, our eyes transmit 'normal' rates of pulses of light to that part of the brain. This is when the brain is at its peak or best to be able to differentiate and percieve speed(s). For now we'll say 60mph.
At night however, or especially in the fog, the pulses and amount of light entering the eye is less than that of clear weather, and thus, it takes a 'faster' speed to make the brain percieve you going at the same speed in clear weather. In this case, it doesn't feel like you are going 60mph untill you are actually going say, 73-82mph.
Thats all I remember from the dateline thing. I forgot which college did the research on this (Anyone remember?). You can even do this test on yourself.