Frequency and Types of Violations of Iowa Motorists

In recent year various studies have been made of the personal characteristics and driving habits of motor vehicle operators. Of these perhaps the most extensive is the five-year study being conducted at Iowa State College. One purpose of this study is to determine the effect of training on accidents and violations in relation to age, sex and type of training of drivers. Preliminary reports on certain aspects of the general problem have already been made. From the first sampling made in 1950, some of the published contributions are those of Lauer (2), Lauer and Schumacher (4), Siebrecht (5) and Siebrecht, Schumacher and Lauer (6). The present study concerns the frequency and types of violations of Iowa drivers in relation to other factors as obtained from a second sampling made in early 1953