being afraid of high speeds is not necessarily the right explaantion. you got to be careful and treat those speeds with respect. Dan hits the nail. it takes frictions of seconds for a desaster to strike. in many cases it is not even your fault but people that intend to change lanes have a very hard job guessing how fast one really is. just one small misinterpretation and you´re forced to slam the brakes. the other one didn´t even notice what he did to you...how could he? always have your speed appropriate to the traffic. if you stick to that rule, you miss many many chances to have a nice bad ass accident.