HDM-4 Version 2 Documentation Now Available: HDM-4 Version 2 Documentation is now available free to registered HDM-4 Version 2 licence holders by downloading from the HDMGlobal website. The following volumes are currently available:

• English:
  • Volume 1 : Overview of HDM-4
  • Volume 2 : Applications Guide [available soon]
  • Volume 3 : Software User Guide
  • Volume 4 : Analytical Framework and Model Descriptions
  • Volume 5 : A Guide to Calibration and Adaptation [Version 1 documentation only]
• French:
  • Volume 3 : Software User Guide [available soon]

To receive instruction on how to download these updates complete the registration information below and click on the submit button. Your licence details will be validated and an email will be sent with the download instructions and the passwords required to access the documentation.

HDM-4 Version 2.03 Upgrade is now available free to registered HDM-4 Version 2 licence holders by downloading from the HDMGlobal website. The upgrade is aimed at resolving a number of issues that affect the results of the software.

The new issues that are included in the upgrade are indicated below:

1) ENERGY CONSUMPTION: The calculation of the energy consumption of work items did not correctly use the energy units in which the usage was defined.

2) ENERGY CONSUMPTION: The Energy Usage defined for an improvement reconstruction was used to calculate the energy usage for a maintenance reconstruction work item. This error has been corrected.

3) MULTI-CRITERIA ANALYSIS: The data used in MCA if the "Comfort" criterion was selected, and the mode of analysis was "analysis by section" was not correct. This has been corrected.

4) MULTI-CRITERIA ANALYSIS: The multi-criteria analysis did not take account of which criterion was selected as the base criterion. This could lead to incorrect results. This has been corrected.

5) RUNDATA: The average IRI for a section over the analysis period is not calculated correctly. This has been corrected.

6) WORK ITEMS: The works quantity for the maintenance reconstruction work item was being reported as 0 m^2. This has been corrected and the correct area of reconstruction is now reported.

7) ASSET VALUATION: The units for the replacement cost was not indicated. The message has been improved to state that the replacement cost is for the whole section.

8) DEFAULT WORK COSTS: The maximum cost for the work items has been increased to allow a larger default cost to be entered.

9) DEFAULT WORK & ENERGY COSTS: The units for the energy usage could not be changed. This has now been corrected.

10) DEFAULT WORK & ENERGY COSTS: The classification of the operations has been improved by clearly identifying the maintenance and improvement items.

11) MULTI-CRITERIA ANALYSIS: The results dialog for Multi-criteria Analysis (MCA) did not display the project alternative/section alternative name so it was difficult to interpret the results. The display of the results has been improved to display the name of the alternative in the column header and as a tool-tip.

12) IMPROVEMENT STANDARDS: The operation types NMT Lane Addition, and NMT Lane Upgrading do not require the user to define a traffic flow period. However, the analysis input validation states that one must be defined. This error has now been corrected.

13) PROGRAMME ANALYSIS: The scrollbar in the grid displaying the sections within a group was not adjusted for the number of selected/available sections. This has been corrected.

This version also includes the update in HDM-4 v2.02:

1) WORK ITEMS: The preparatory work quantities and costs were incorrectly calculated for resealing, overlay, and inlay operation types. This resulted in the preparatory costs being many times higher than expected, therefore effecting the results of the economic analysis of studies. These errors have now been corrected and it is recommended that studies are re-run to determine the impact of the corrected calculations.

2) ASSET VALUATION: An omission was found in the Asset Valuation specification which resulted in the asset value of a pavement being incorrectly computed following an improvement standard. The specification has been amended and the software implementation updated accordingly.

3) ALTERNATIVES INTERFACE: Double-clicking on an improvement standard assignments name to display the details could result in the system crashing in some situations. This has been corrected.

4) ASSET VALUATION: Some input values were limited to 99.99%. This has been corrected to allow the user to enter values between 0 and 100%

5) ASSET VALUATION: The component age year was not set to a default value when a new section was created. This resulted in an error message when the user moved away from the screen even if they made no changes. This parameter is now initialised but should be reviewed by the user when entering asset valuation data.

6) IMPORT EXPORT: For unsealed work items the final gravel thickness and initial roughness parameters were not being imported/exported correctly. This has been corrected.

7) IMPORT: When importing work standards the option to overwite all New Construction Section was displaying an incorrect message prompt, and did not operate correctly. This has been corrected.

8) NEW CONSTRUCTION SECTIONS: It was not possible to change the new construction section's Accident Class. This has now been corrected.

9) VEHICLE FLEET: If the user had not defined some text for a vehicle type's description an error would be received when importing or exporting the vehicle fleet. This error has been corrected.

10) DATA MIGRATION TOOL: If the original workspace had a vehicle fleet in which a vehicle type did not have any text defined for its description field an error would be generated during the migration process, and the vehicle fleet and associated data would not be migrated correctly. This error has been corrected.

This version also includes the update in HDM-4 v2.01:

1) DATA MIGRATION TOOL: The conversion of new Roughness calibration factors are not treated consistently in calibration and work items. The tool has been updated to ensure the factors are treated consistently and are initialised with a default value of 1.0.

2) WORKSPACE: Using the 'Recent Workspaces' menu item to select a previously opened workspace caused a system error. This has been fixed.

3) ROAD NETWORK: Only an integer number could be entered for the section's vehicle AADTs on systems that had a regional setting using a comma for a decimal separator. This error has been corrected.

4) ROAD NETWORK: In certain circumstances, changing a sections surface class would cause HDM-4 to crash. This error has been corrected.

5) ROAD NETWORK: After changing a section's surface class no condition data was present. This error has been corrected.

6) ROAD NETWORK: For a bituminous section, after selecting method [2] to calculate SNP the results were not shown and method [1] remained selected. This error has now been corrected.

7) ALTERNATIVES INTERFACE: It was not possible to deselect the inclusion of generated traffic and benefits and costs associated with an improvement standard. This error has been corrected.

8) ALTERNATIVES: After changing the start year for a New Section, its name was incorrectly displayed in the alternatives navigation pane. This error has been corrected.

9) MULTI-YEAR FORWARD PROGRAMMING: The salvage value was not being calculated and included in the analysis. This error has now been corrected.

10) MULTI-YEAR FORWARD PROGRAMMING: When performing a MYFP with economic analysis the Road User Costs where not being calculated correctly. This resulted in incorrect economic indicator and work programme results. This error has now been corrected.

11) BUDGET OPTIMISATION: Analyses that exceeded the limits for performing budget optimisation using the EBM-32 method (see HDM-4 documentation for more details) did not produce the desired optimisation results. This error has now been fixed.