In some cases, people who suffer from sleep apnea will use a mask that supplies continuous positive air pressure (CPAP) to combat the problem. Makers of these devices have good reason to promote themselves to the trucking industry, where drivers can legally spend as many as 70 hours in a week on duty.
Three device makers are doing just that, with the help of a major truckload fleet. They have put together a field test of battery-powered CPAP masks used among truck drivers. The battery is mounted in a sealed box under the bunk.
Beginning last May, four tractor trailers have been equipped with a dedicated battery to power a mask that runs on 12 volts DC. The goal is to include a fifth sleeper-cab tractor trailer.