Variable speed limits (VSL) continue to be experimented with and at times are confusing to human drivers, meanwhile self-driving cars will readily accommodate VSL.

Another advantage of variable speed units is that the reduced speed enables the maintenance / time between overhauls (TBO) to be extended by approximately 20%, which results in lower costs.

Variable speed technology allows for a much wider range of peak efficiency operation, which maximizes energy capture and minimizes the excessive loads placed on the turbine’s drive train.

It also proves the effectiveness of variable-speed drive (VSD) technology at optimizing chiller energy performance in all conditions, even high-load operations. It’s widely recognized that a chiller ...

That’s because, unlike fixed-speed compressors that operate on an on-off basis, variable-speed compressors require a signal or program to control their speed through a VFD or built-in compressor ...

INDOT said the new variable speed limit system will adjust speed limits based on traffic, roadway incidents, work zones and weather. The system is expected to go live on or about Sept. 10.

Beginning next Monday, drivers will see new variable speed limit signs throughout a 10-mile stretch of U.S. Highway 97 south of Bend, ODOT said Wednesday.

Variable speed limits: Here's the plan for I-465 on the southeast side. Feng said how effective variable speed limits are depends on how many people follow it.