This application can be used to prepare rolling work programmes in which candidate road sections are identified and assigned maintenance or improvement options. HDM-4 calculates the NPV and expenditure requirements of each option. This project level application is concerned with the evaluation of one or more road projects or investment options. Road sections with user-specified treatments are analyzed over a specified life cycle. Typical projects include pavement maintenance and rehabilitation, road widening or geometric improvements, new construction, etc.
Users can define several road networks and sub-networks, with an unlimited number pavement sections.
The HDM-4 network referencing system supports the concept the links and nodes. This approach to network referencing is designed to be flexible in order to integrate with a wide range of referencing conventions used in other databases with which HDM-4 may need to interface. The HDM-4 database also provides facilities for storing characteristics of vehicle types required for calculating vehicle speeds, operating costs, travel time and other vehicle effects. Several vehicle fleets can be set up for use in different analyses based on the wide range of default data provided. The HDM-4 configuration module can be used to customize all components of the system.