Rural roads are the most dangerous roads for all kinds of driver and speed is the problem. A study of single-carriageway rural roads estimated that a 10% increase in average speed results in a 30% increase in fatal and serious crashes.
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I think the fact that drivers can legally do 60mph is absolute negligence and shows a disregard for human life. Rural roads account for well over half of all fatal crashes. Cyclists, motorcyclists and car drivers are more than three times as likely to be killed per mile travelled on a rural road than an urban road.
Even if you are driving slowly, others may not be. I think this change is urgent.