Abstract
This volume, the third of a four-volume final report, presents a procedure for evaluating and improving the geometric design consistency of rural highways. The procedure is based on basic driver behavior principles, a sound conceptual approach and considerable empirical evidence. Basic geometric design objectives, a procedure and examples and remedial countermeasures are presented to aid the designer in applying the procedure. Both 2-lane and 4-lane highways in flat or rolling terrain can be evaluated with this procedure. A detailed step-by-step procedure is presented for evaluating the geometric design inconsistency of proposed or existing rural highways. Two case studies are presented to illustrate the evaluation procedure.