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

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