Correlation of the characteristics of two-lane roads and accidents

José Mª PARDILLO MAYORA
Civil Engineering Department of Transportation
Polytechnic University of Madrid

Roberto LLAMAS RUBIO
Highways Ministry of Development

ABSTRACT
The article describes a research project in which they have helped the Highways Agency and the Polytechnic University of Madrid in order to establish a model for estimating accident rates from the characteristics of conventional roads of the Network State. As a preliminary step for the development of the model a series of dependent variables of the characteristics of the road and its patterns of variation were defined and analyzed its correlation with accident rates. From the results of the variables that showed greater association with accident rates, with a multivariate model estimation of hazard rates it was calibrated conventional roads were selected. The variables for which a higher correlation with hazard ratings were found density of access, visibility distance, average speed limiting and the ratio of the length of the section with overtaking ban. Finally conclusions derived from the relationship between the variables studied and described hazard ratings.

KEYWORDS
Road safety, conventional roads, multivariate analysis, hazard ratings