**Lawrence A. Klein** received a Bachelor of Electrical Engineering degree from the City College of New York in 1963, an M.S. in Electrical Engineering from the University of Rochester in 1966, and a Ph.D. in Electrical Engineering from New York University in 1973. Dr. Klein is a member of the National Cooperative Highway Research Program (NCHRP) 03-145 Panel to develop guidance for the National Traffic Sensor System Evaluation Program and the 08-157 Panel to determine Best Practices for Data Fusion of Probe and Point Detector Data. He is a past member of the Transportation Research Board’s Highway Traffic Monitoring and Freeway Operations Committees. He led ASTM’s E17 Group V-ITS in developing worldwide standards to specify, install, and evaluate traffic flow sensors. At the French Institute of Science and Technology in Transportation, Planning, and Networks (IFSTTAR) in Bron, France, Dr. Klein lectured at EPFL-LAVOC (Swiss Laboratory of Traffic Facilities at Lausanne Federal Institute of Technology) in Lausanne, Switzerland, and at the EU-sponsored Real-Time Road Traffic Monitoring and Control Summer Workshop. He was also a Visiting Professor at the Harbin Institute of Technology, School of Transportation Engineering and Science, Harbin, China for several years. At Waveband Corporation he served as Director of Advanced Technology Programs. While at Hughes Aircraft Company, he was Principal Investigator on the FHWA Detection Technology for IVHS (later ITS) Program. As Chief Scientist at Aerojet ElectroSystems (TAMS Division), he was responsible for programs that integrated active and passive millimeter-wave and infrared multispectral sensors in satellites and smart "fire-and-forget" weapons. At Honeywell, he developed passive millimeter-wave midcourse missile guidance systems and millimeter-wave sensors to trigger land mines. His books include *Traffic Flow Sensors:* *Technologies, Operating Principles, and Archetypes* (2020), *Sensor and Data Fusion for Intelligent Transportation Systems* (2019), *ITS Sensors and Architectures for Traffic Management and Connected Vehicles* (2018), *Sensor and Data Fusion: A Tool for Information Assessment and Decision Making* (2004, 2012), *Traffic Detector Handbook, 3rd Ed.* (2006), *Sensor Technologies and Data Requirements for ITS* (2001), and *Millimeter-Wave and Infrared Multi-sensor Design and Signal Processing* (1997).