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, ...

An example of what variable speed limit signs look like above a highway in Washington. Courtesy of the Washington State Department of Transportation When icy conditions led to a 133-car pileup on ...

Drivers across Texas may soon see speed limits change in real time. Digital signs flashing different speed limits are starting to pop up on Texas highways. They're part of a new initiative in the ...

New digital speed limit signs are already active on some roads, changing the limit depending on numerous factors. Texas introduces variable speed limits using digital signs after a deadly 2021 pileup.

Add Yahoo as a preferred source to see more of our stories on Google. The government has ordered an investigation into how thousands of motorists were wrongly recorded as breaking the speed limit on ...

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 ...

Abstract: Synchronous machines usually operate at constant speed in power systems. However, there are specific applications, such as the generators used in diesel-electric transmissions or Type 4 wind ...

Abstract: In an effort to make pumped hydropower storage (PHS) technology feasible for regions with a flat topography, recent research shows promising results using a contra-rotating reversible ...

Electronic variable speed limit signs are now active on I-35 in Fort Worth and U.S. 54 in El Paso, with broader rollout planned. Speeds can be temporarily lowered by up to 10 mph during weather events ...