Abstract: Variable speed limits (VSL) is a major Intelligent Transportation System (ITS) technology for controlling freeway mainline traffic, which have been increasingly used to improve traffic ...

Abstract: Centrifugal Compressors in the Oil and Gas Industry frequently use electric motors as drivers. Due to the high variability in process conditions users often specify variable speed electric ...

Heat pumps are now thriving in some of the world’s coldest regions, with Norway, Sweden, Finland, and even Canada seeing record adoption. Modern systems—using variable-speed compressors, better ...

National Highways has apologised for a technical error that meant variable speed cameras had been incorrectly detecting some drivers as speeding. The agency, which ...