Abstract
One significant measure of the design quality of a road is consistency. In this study, consistency based on operating speed was calculated in two-lane rural highways of the province of Granada. Three consistency measures were calculated for 506 homogeneous road sections: the relative area, which represents the area bounded by the speed profile and average speed of a road segment, the standard deviation of the operating speed in each design element along the road segment and the consistency model defined by Polus and Mattar-Habib (2004), based on the previous measures introduced. Some discrepancies have been found in the results obtained. (Author/publisher)