Volume 1 of a study designed to conduct a state of the art review of driver problem assessment consists of a review of related literature. The purpose of the study is to identify diagnostic assessment techniques in isolating driver problems. The review was based on three levels of information sources: (1) information from primary sources--driver licensing file, (2) information from secondary sources--other agencies, and (3) information from direct driver measurement. Each level is further divided into the following conceptual areas: (1) driver performance and ability, (2) human condition and states, and (3) exposure variables. Level 1 data sources have the greatest current utility for diagnostic assessment in an operational setting, based on the relatively inexpensive means of data retrieval and the consistency of significant predictors found at this level. Level 2 data present several legal and logistical problems due to the privileged information requirements and a lack of coordination between agencies. Level 3 data usually require further research before their operational utility can be determined since they are currently not widely used for assessment in social control agencies. The discussion is supplemented by illustrations and tables. A list of references is given for each chapter, and an author index is included. (Author/EC)