The reasoning given to support the claim is not entirely sound. While it is true that studies show that higher fines can result in less speeding, it does not necessarily mean that doubling the fines will automatically improve safety. Factors like enforcement, awareness, and road conditions also play a significant role in ensuring safety. Additionally, assuming that if people can afford a $50 fine, they can also afford a $100 fine may not be accurate, as individuals' financial situations can vary greatly. Overall, a more comprehensive approach would be necessary to ensure effective measures for improving road safety.

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The reason given to support the claim doesn't make complete sense. While it's true that higher fines can reduce speeding, it doesn't mean that simply doubling the fines will automatically make things safer. Other factors like how the rules are enforced, people's awareness, and the condition of the roads also affect safety. Also, assuming that if someone can afford a $50 fine, they can afford a $100 fine might not be true for everyone, as people's finances differ. Overall, a more thorough approach is needed to make the roads safer.