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HDM-4 Inputs and Options. Speed Flow Type. Speed (km/hr). S1. S2. S3. Sult. Flow veh/hr. Qnom. Qo. Qult. Traffic Flow Pattern. Flow Periods. Flow. Peak. Next to Peak. Medium flow. Next to Low. Overnight. Number of Hours in the Year. Rise Plus Fall & Horizontal Curvature.

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speed flow type
Speed Flow Type

Speed (km/hr)

S1

S2

S3

Sult

Flow

veh/hr

Qnom

Qo

Qult

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traffic flow pattern
Traffic Flow Pattern

Flow Periods

Flow

Peak

Next to Peak

Medium flow

Next to Low

Overnight

Number of Hours in the Year

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rise plus fall horizontal curvature
Rise Plus Fall & Horizontal Curvature

Vertical Profile

Rise Plus Fall = (R1+R2+R3+F1+F2) / Length(meters/km)

Horizontal Profile

Horizontal Curvature = (C1+C2+C3+C4) / Length(degrees/km)

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analysis by sections or project
Analysis by Sections or Project
  • Analysis by Section: Section alternatives are defined for each section. The analysis determines the optimum alternative for each section. NPV is calculated for each section alternative. Analysis by Sections supports neither new sections nor diverted traffic.
  • Analysis by Project: A project is composed of many sections. Project alternatives are defined indicating a maintenance/improvement standard per section. NPV is calculated for each project alternative (i.e. for the group of sections). The analysis determines the optimum alternative for the sections as a group. Analysis by Project supports the analysis of new sections and diverted traffic.

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analysis by sections example
Analysis by Sections Example

Each section is evaluated individually and can have any number of alternatives. HDM-4 produces a NPV for each section alternative that is used to find the optimal alternative per section.

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analysis by project example 1
Analysis by Project Example 1

Analyses road sections together as a package by considering project alternatives as the unit for performing economic analysis. HDM-4 produces a NPV for each project alternative.

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analysis by project example 2
Analysis by Project Example 2

Analysis involving new sections and diverted traffic can only be performed using the Analysis by Project method.

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multi year forward programme evaluation
Multi-year Forward Programme Evaluation

IRI

Budget Period

Deferred investment

Investment now

Benefits from Investment

Years

Budget period: for example 1, 2 or 3 years

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hdm 4 version 2 0 case studies
HDM-4 Version 2.0 Case Studies
  • HDM-4 Case Studies
    • Included with HDM-4
    • Documented on Volume 2:Application GuideC:\Program Files\HDM-4\Case Studies\Eng
  • World Bank Case Studies
    • Provided by the World BankC:\HDM-4 Version 2.0 WB Case Studies 1.0

Windows FoldersContaining HDM-4 Workspace

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hdm 4 workspace
HDM-4 Workspace
  • Contains the configuration and inputs of an HDM-4 study
  • Can be copied from one computer to another
  • Composed of two files:

OBJECTS.DAT

OBJECTS.IDX

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to review an hdm 4 study
To Review an HDM-4 Study
  • Obtain the HDM-4 workspace (OBJECTS.DAT and OBJECTS.IDX files) created for the study
  • Copy the HDM-4 workspace files into any folder on your computer
  • Run HDM-4 and open the workspace, using the Open Workspace option and then locating the folder in which you have copied the workspace files
  • Open the HDM-4 study

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hdm 4 version 2 0 structure
HDM-4 Version 2.0 Structure

InputData

Application OptionsData

ConfigurationData

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hdm 4 folders
HDM-4 Folders

HDM-4 Folders

- HDM-4 folders resemble Windows Explorer folders, but these are not actual Windows folders, they are components of the HDM-4 Workspace.

- An HDM-4 Workspace is a Database that contains allinput, application options and configuration data for a given study.

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hdm 4 workspace16
HDM-4 Workspace

Windows folder where HDM-4 Workspace is located

- There could be many HDM-4 Workspaces on a hard disk, which are located on different Windows folders.

- An HDM-4 Workspace Database is composed of thefollowing files: OBJECTS.DAT and OBJECTS.IDX, which can be copied from one Windows folder to another.

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hdm 4 run data directory on setup run
HDM-4 Run Data Directory on Setup Run

HDM-4 Run Data Directory

- The Run Data Export Directory is the Windows folder that will store all the output files created by HDM-4 for an HDM-4 run.

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hdm 4 output file
HDM-4 Output File
  • HDM-4 stores all the output results of an HDM-4 run on a single Access file named “RunData.mdb” located at the Run Data Export Directory.
  • Users can explore the output results of an HDM-4 Run by importing the output data stored on the RunData.mdb file into Excel or a Pavement Management System.

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export and import options
Export and Import Options

Import or Export to Access Files

You can export or import each item of information to or from an Access file.

Access files are used to connect HDM-4 with a Pavement ManagementSystem or Excel.

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export and import file formats
Export and Import File Formats

Road Network Export File Format.pdfVehicle Fleet Export File Format.pdflocated on C:\Program Files\HDM-4 Version 2.0\Documentation\Eng

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