"On August 8, 2017, the Federal Motor Carrier Safety Administration (FMCSA) and Federal Railroad Administration (FRA) withdrew a rulemaking effort that would have required some truck drivers and rail engineers to be screened for obstructive sleep apnea (OSA). The agencies stated that, while OSA remains a safety concern, 'current safety programs and FRA's rulemaking addressing fatigue risk management are the appropriate avenues to address OSA.' Safety advocates question whether current efforts are adequate. OSA is a safety concern for the federal Department of Transportation (DOT) because it is associated with a significant increase in the likelihood of being involved in a crash. One study found that fatigued driving was a factor in 13% of large truck crashes. OSA is the most common medical cause of excessive daytime sleepiness or fatigue. The Federal Aviation Administration requires that commercial pilots meeting certain criteria be screened for OSA by medical examiners, and the rulemaking was considering similar requirements for truckers and railroad engineers."
CRS Insight, IN10757
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html