This paper deals with the problems of designing tractors to be sold all over the world while at the same time minimizing the variables in order to obtain the economies of mass production. The physical, psychological, and legal requirements and difficulties are dealt with and a summary of the maze of European road and safety regulations is included as an Appendix. The author concludes that since these regulations are inescapable, it is in the interests of the industry to support every effort at rationalizing the requirements among the different countries.
