Simulates how different maintenance standards (e.g., patching, overlays, or reconstruction) reset the pavement condition and slow future deterioration.
Focuses on the prioritization of a defined list of candidate road projects into a multi-year rolling work program.
HDM-4 is divided into three dedicated application tools tailored to different levels of road administration decision-making:
Quantifies the economic impact on road users, including vehicle operating costs (fuel, tires, maintenance), travel time, and accident costs.
Predicts defects like cracking, rutting, potholes, and roughness (IRI) based on traffic loading, climate, and structural strength.
Compares technical and economic viability for individual investment options, such as whether to widen a specific road or apply a particular pavement upgrade. Key Features and Capabilities
Optimizes the use of constrained budgets by selecting the best combination of works to maximize economic benefits (often using the incremental NPV/cost ratio). Project Analysis
Detailed evaluation of specific road links or sections.
