I had a near miss on when driving home from the airport on Monday, December 12, 2016. I was travelling on I35 at 65 mph when cars ahead of me came to a sudden stop to behind traffic on an off ramp. Fortunately, I was following at a safe distance, but I did have to step on the brake hard enough for the anti-lock system to engage and the truck behind me pulled off to the shoulder to stop. In retrospect, a major factor in this situation was that I did not plan for vehicles ahead of me to come to a complete stop when the flow of traffic was 65 mph. We often see brake lights on the highway but expect cars to slow down gradually.
Based on the chart below, the thinking and stopping distances increase significantly with speed. It estimates that the stopping distance increases by about a factor of four at highway speeds, compared to speeds that you would drive on surface streets.
Watch What Happens When SUV Slides Into Cop Car - NBC News: http://www.nbcnews.com/video/watch-what-happens-when-suv-slides-into-cop-car-837378627989?cid=sm_tw