In the process of training and examining professional drivers who serve as commercial trucks and coaches’ drivers, studying the willingness of taking training courses is a crucial concern for transport authorities for developing training programs on transportation. To this purpose, an adapted version of the statistical method of Kolmogorov-Smirnov, three sample, has been utilized to investigate the similarity of distribution functions for three types of drivers who receive permission with taking training courses and examinations, taking examinations without training courses, and receiving permissions without examination and training courses. Data, for those received permissions across the West-Asian country of Iran, has been collected for a year through the system used for issuing drivers’ permissions for commercial transportation followed by categorizing into thirty-one provinces and analysis. The results revealed that their distribution functions are different for three types of drivers over the provinces. Therefore, transport authorities should design driver’s exams and training courses different province to province.