One of the most inflammatory and divisive topics in road or highway safety is that of speed in relation to safety.
The first question that has to be addressed is what exactly do we mean in this context by the word “speed”? It is very important not to fall into the trap of thinking it only relates to breaking the posted speed limits, even though that is still a serious issue (see below).
For over ten years, Advanced Drivers of North America [ADoNA] has been teaching the important fact that official “overall stopping distances” for cars have been inaccurate and needed to be treated as being significantly longer than previously thought. Now, at last, our own calculations have been proven appropriate and extremely accurate.