Lower speeds conserve fuel and make highways safer, say proponents of a mandatory national speed limit. Others say that its cited benefits are false and that impeding traffic is far worse for drivers and the environment. Should a 55-mph maximum speed limit be imposed? Post your thoughts, and don't forget to check out the debate in the latest issue of U.S. News Weekly.
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Take our poll: Should a 55-mph National Speed Limit Become Law?