PREDICTION OF OPERATING SPEED ON THREE-DIMENSIONAL HIGHWAY ALIGNMENTS

摘要

Achieving consistent geometric design is an important goal in highway design to ensure obtaining safe, economical, and smooth traffic operation. Existing operating speed models for design consistency in North America and Europe are mainly base don two-dimensional (2D) analysis of highway horizontal alignments. This Paper develops operating speed models for two-lane rural highways that account for the three-dimensional (3D) Nature of highways.