Lawrence A. Klein, has more than forty years experience of aerospace and traffic management experience, as a specialist in systems engineering and the development of sensors and data fusion concepts. He is a consultant and has been a research engineer, including working as Director of Advanced Technology Programs at Waveband Corporation and at the French National Institute for Transport and Safety Research. He is a Member of Transportation Research Board's Highway Traffic Monitoring Committee and past member of the Freeway Operations Committee, and led the ASTM E17 Group V-ITS development of worldwide standards to evaluate traffic sensors. Klein is also a Visiting Professor at Harbin Institute of Technology in China, and is the principal author of the third edition of the FHWA's Traffic Detector Handbook.