FMCSA withdraws its March 10, 2016, ANPRM concerning evaluation of safety sensitive personnel for moderate-to-severe obstructive sleep apnea. FMCSA and Federal Railroad Administration (FRA) sought data and information concerning the prevalence of moderate-to-severe obstructive sleep apnea (OSA) among individuals occupying safety sensitive positions in highway and rail transportation, and on its potential consequences for the safety of rail and highway transportation. The Agencies also requested information on potential costs and benefits from regulatory actions that address the safety risks associated with motor carrier and rail transportation workers in safety sensitive positions who have OSA. Upon review of all public comments to the ANPRM, FMCSA has determined there is not enough information available to support moving forward with a rulemaking action and so the rulemaking will be withdrawn.