Evaluation of Expressway Alignment Based on Operation Speed

With a review of the advance of highway safety audit researches in the abroad,it proves that highway safety audit is of great importance.The condition of road alignment is closely related with road safety,comfortable road alignment is the basic guarantee to the vehicle safety.In the aspect of elevating the road safety,it is important to find and reduce or removing these potential danger factors.Some indexes and suggests for road safety audit are proposed according to the calculation of operating speed and the analysis of the relationship between the operating speed and road components.In combination with a real project,the potential danger factors were found and the advices for future design were proposed as well.