Advances in technology are making it easier for fleets to screen drivers for a medical condition that’s believed to be a significant contributor to preventable crashes, while also enabling health care providers to monitor treatment while drivers are on the road.

Not that long ago, the mindset of many fleet operators was to get as much muscle power in engines as they wanted or could afford. That often meant 15-liter engines that could deliver a whole lot of horsepower. But times have changed.

Not everyone thinks 11- and 12-liter engines are right for their fleets and operations.