Tracey Leigh Signal is a New Zealand academic, and is a full professor at Massey University, specialising in fatigue and sleep, especially in relation to the aviation industry, and in women and children.

Her doctoral thesis was titled Scheduled napping on the night shift: consequences for the performance and neurophysiological alertness of air traffic controllers, and was supervised by Philippa Gander.

[3] Signal works in the Fatigue Management and Sleep Health group of the Sleep/Wake Centre at Massey University.

[7] Signal has been an invited member of two International Civil Aviation Organisation Fatigue Risk Management Task Forces, and has contributed to national and global standards on civil aviation.

[8] She has provided expert advice to the Coroner's Office, WorkSafe New Zealand and to the Transport Accident Investigation Commission.