The National Transportation Safety Board sent letters to the federal agency that regulates bus and truck safety and the US Coast Guard citing accidents in which sleep apnea was a factor.

• 国家运输安全委员会致函联邦监管公共汽车和卡车安全以及美国海岸防卫队的机构，指出在交通意外中，睡眠呼吸暂停是一个因素。