HDM-4 Road Asset Management
“HDM-4 is a software package and associated documentation which will serve as the primary tool for the analysis, planning, management and appraisal of road maintenance, improvements and investment decisions”.
HDM-4 provides a powerful system for:
– road management
– programming road works
– estimating funding requirements
– budget allocations
– predicting road network performance
– project appraisal
– policy impact studies
There are four main areas of application: Strategic Planning, Roadwork Programming, Project Analysis, and Research and Policy Studies.
01. Strategic Planning/Strategy Analysis
Used to prepare medium to long term planning estimates of funding needs for road network development and maintenance.
Estimates of the medium to long term budget requirements for the entire road network together with forecasts of pavement performance and road user effects can be obtained.
The impact of different Budget Scenarios can be estimated together with the Asset Value of the network.
02. Roadwork Programming/Programme Analysis
Used to prepare rolling work programmes in which candidate road sections are identified and assigned maintenance or improvement options.
HDM-4 calculates the economic benefits and expenditure requirements of each option.
A schedule of optimum pavement maintenance and/or road improvement projects which can be carried out within specified budget constraints are identified.
03. Project Analysis
Project analysis can be used to estimate the economic or engineering viability of road investment projects by performing lifecycle analysis of pavement performance, maintenance and/or improvement effects together with estimates of road user costs.
The main outputs include:
– Annual predictions of pavement performance
– Pavement maintenance and road improvement effects
– Road user costs and benefits
– Estimates of environmental effects
– Standard economic indicators such as NPV and EIRR
Sensitivity Analysis allows a user to investigate the impact of variations in key parameters on the analysis results.
Multi-Criteria analysis (MCA) provides a means of comparing projects using criteria that cannot easily be assigned an economic cost. For example, environmental, social or political impacts.
04. Research and Policy Studies
HDM-4 can be used to conduct a number of road sector policy studies including:
– Funding policies for competing needs, e.g. feeder versus main roads
– Impacts of road transport policy changes on energy consumption
– Impact of axle load limits
– Pavement maintenance and rehabilitation standards
Pavement Management Systems and HDM-4
By exchanging data with a Pavement Management Systems (PMS) or other databases HDM-4 can utilise existing data to perform an analysis. The output reports can be adapted to individual requirements thereby integrating HDM-4 into an existing road management framework.
Official site: http://www.hdmglobal.com/