"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."
CRS Insight, IN10757
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html