With large numbers of actual traffic accidents of Shenda Freeway, Liaoning Province, Harbin City and so on in China, parameters and the effect on accidents of horizontal alignment, vertical alignment and cross section are studied systematically, and the disciplinary analysis of the effect is presented. The critical value and the reasonable range of curve radius and angle of deflection are put forward in view of road safety. The safe grade value and the proposed critical grade are raised in vertical alignment design. The effect on accident of the number of lanes and type of cross section are analyzed, therefore safety influence factor of lanes number (SIFLN) and safety influence factor of cross section type (SIFCST) are presented and suggestion values are given. The viewpoint is put forward that high subgrade and steep slope are against to traffic safety. The suggestions of design parameters of the Design Criteria and the corresponding countermeasures are advanced for safety. For the covering abstract see ITRD E135448.
Samenvatting