This paper is essentially a set of instructional notes intended for the use by those who want to familiarize themselves with the methodology of human factors as applied to the design of truck cabs. Careful study and use of the references is required if the notes are to be useful. The need for constructing mock-ups and for experiments using typical users as test subjects is repeatedly emphasized. The basic elements of anthropometrics are reviewed. Seeing is treated as the first step in the decision-making process. It is the most important channel of communication between the driver, the vehicle, and the surrounding road and traffic. Similarly, control location and identification is a problem in communication between driver and vehicle. Control forces, seating, and environmental requirements of comfort and alertness are reviewed.Simulation and simulators are treated here as an essential part of experimental aspects of human factors design. The role of mathematical models is examined.A number of exercises accompany the text. The references list 34 texts and papers as well as 9 applicable SAE Recommended Practices. Illustrations are held to a minimum.