Citation

Turner S, Wood G, Roozenburg A. Proc. ARRB Group Bienn. Conf. 2006; 22(CD-ROM).

Affiliation

Beca Infrastructure; Macquarie University

Copyright

(Copyright © 2006, ARRB Group)

DOI

unavailable

PMID

unavailable

Abstract

Accident occurrence is typically low at rural priority controlled intersections, due to low traffic volumes, compared with priority  controlled urban intersections.  Unlike many urban  intersections, the low accident occurrence makes it difficult,  from the accident history alone, to identify accident trends and  justify improvement projects.  This research project has  produced accident prediction models for rural priority-controlled  intersections; based on traffic volume, sight distance, approach  speed and geometric design.  The models can be used to  identify the effect of safety deficiencies at an intersection (for  example, effect of poor visibility), can be used in economic  evaluation of intersection upgrades and can be used to assess  the impacts of traffic from new land-use developments on the  rural road network.  The study also produced flow-only models  for high-speed signalised and roundabout controlled  intersections in New Zealand and high-speed signalised  intersections in Victoria (Melbourne).  This enables an analyst  to assess the likely changes in accident occurrence and of  various accident types of a change in control (from priority to  either a roundabout or signals) at higher volume intersections.   This paper also outlines some of the more important statistical  methods that are used to assess the quality of the models  produced.