This paper combines the traffic safety theory with the road network design problem to analyze the techniques of identifying the potential hazardous locations and improving their safety situations for road networks being designed.

Improvement in the quality control method to distinguish the black spot of the road;

Outstanding factor method to black spot differentiation;

This paper selects seven sections of Jinan-Qingdao Freeway as typical black spots and builds the transect accident ratio evaluation model based on quantification theory.

This paper carries on an in-depth study on traffic safety in freeway tunnel, including traffic characteristics, distribution characteristics of traffic accidents, influence factors of traffic accidents, the identification of accident black-spots, preventive countermeasures of traffic accidents.

Identification for road accident-prone locations;

Because the complexity of accident-prone locations’causes of information, it is effective to identify the major causes and then take corresponding countermeasures, which can reduce the frequency and severity of accidents with minimal investment.

Traffic conflict identification of road accident blackspots;

On the basis of road accident records,adopting stepwise cluster analysis and Bayesian probabilistic model, this paper investigates the method of identification of road accident blackspots.