Speed limits are a subject of constant discussion across America, and because of decentralized state regulation over the limits, there can be a wide variance in limits from state to state. Arizona, ...

Variable motorway speed limits have been in place in the United Kingdom on some routes for years now. Despite being controversial in some circles, these have clear benefits for modern motoring, as ...

Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...