highway-alignment-designer

# Highway Alignment Designer Skill ## Purpose The Highway Alignment Designer Skill designs horizontal and vertical highway alignments including curves, superelevation, and sight distance per AASHTO Green Book standards. ## Capabilities - Horizontal curve design (simple, compound, reverse, spiral) - Vertical curve design (crest, sag) - Superelevation calculation - Sight distance analysis - Cross-section template generation - AASHTO Green Book compliance checking - Design exception documentation - Corridor modeling support ## Usage Guidelines ### When to Use - Designing new roadways - Evaluating existing alignments - Checking sight distances - Developing superelevation ### Prerequisites - Design speed established - Terrain classification known - Design criteria selected - Survey data available ### Best Practices - Coordinate H and V alignment - Verify sight distances - Consider driver expectations - Document any exceptions ## Process Integration This skill integrates with: - Highway Geometric Design - Bridge Design LRFD ## Configuration ```yaml highway-alignment-designer: curve-types: - simple - compound - reverse - spiral standards: - AASHTO - state-DOT output-formats: - xml - landxml - csv ``` ## Output Artifacts - Alignment geometry - Superelevation diagrams - Sight distance reports - Design summaries