🖥️ Screens & Workflows
Procedural, field-by-field guidance.
Organized to mirror the HDM5 application navigation exactly. Find what each field means, validation constraints, and step-by-step instructions for every screen and tab.
HDM5 Help Centre
Your complete resource for HDM5 — from field-by-field screen guides to engineering and economic calculation models.
Two Parallel Resources
Section titled “Two Parallel Resources”To give you the exact information you need without clutter, HDM5 documentation is split into two focused areas:
📐 Calculation Models
Conceptual formulas & model logic.
Organized by engineering and economic model families — independent of specific screens. Understand how HDM5 computes deterioration, vehicle operating costs, speeds, and Net Present Value (NPV).
Explore by Area
Section titled “Explore by Area”Global Configurations
Learn how to configure reusable reference data sets including Road Deterioration Calibration Sets, Vehicle Fleets, Traffic Flow Patterns, Speed Flow Types, Climate Zones, and Currencies.
Economic & Network Analysis
Step-by-step walkthrough across the 8 appraisal stages: Scope, Road Network, Traffic Data, Work Standards, Project Alternatives, Results, and Optional Sensitivities.
Road Deterioration & Works
Detailed mechanistic equations for bituminous and unpaved road distress modes (cracking, ravelling, rutting, potholing, roughness) and treatment reset effects.
Road User Effects & VOC
Mechanistic formulas for vehicle operating costs (fuel, tyre wear, parts consumption, depreciation), congested travel speeds, road accidents, and tailpipe emissions.
Quick Reference & Support
Section titled “Quick Reference & Support”Frequently Asked Questions (FAQ)Find quick answers to common questions about currencies, data sets, analyses, and model inputs.
Terminology GlossaryClear definitions for standard HDM5 terms, acronyms, and engineering indices.
Using the Help CentreTips for navigating topics, searching (Ctrl + K), and reading mathematical notation.
Contact HDM5 SupportReach out to technical support for help with missing currencies or custom configurations.