HDM-4 Inputs and Options

Transcription

1 HDM-4 Inputs and Options

2 Speed Flow Type Speed (km/hr) S1 S2 S3 Sult Qo Qnom Qult Flow veh/hr 2

3 Traffic Flow Pattern Flow Flow Periods Peak Next to Peak Medium flow Next to Low Overnight Number of Hours in the Year 3

4 Rise Plus Fall & Horizontal Curvature Vertical Profile Horizontal Profile Rise Plus Fall = (R1+R2+R3+F1+F2) / Length (meters/km) Horizontal Curvature = (C1+C2+C3+C4) / Length (degrees/km) 4

5 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. 5

6 Analysis by Sections Example Road Definition of Section Alternatives Sections 1 (base) Section A Routine Resealing Section B Routine Resealing Overlay Section C Routine Overlay Reconstruction Widening Section D Routine Resealing Overlay Widening Realignment Section E Grading Regravelling Paving Road Section Alternatives Results Sections Section A 0 NPV A2 Section B 0 NPV B2 NPV B3 Section C 0 NPV C2 NPV C3 NPV C4 Section D 0 NPV D2 NPV D3 NPV D4 NPV D5 Section E 0 NPV E2 NPV E3 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. 6

7 Analysis by Project Example 1 Road Definition of Project Alternatives Sections 1 (base) Section A Routine Resealing Overlay Reconstruction Section B Routine Resealing Overlay Reconstruction Section C Routine Overlay Reconstruction Widening Section D Routine Overlay Widening Realignment Section E Grading Regravelling Paving Widening Project Alternatives Results Project 0 NPV 2 NPV 3 NPV 4 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. 7

8 Analysis by Project Example 2 Road Definition of Project Alternatives Sections Section A Routine Resealing Resealing Section B Routine Resealing Resealing Section C Routine Resealing Resealing Section D Routine Resealing Resealing New Section Bypass X Bypass Y Project Alternatives Results Project 0 NPV 2 NPV 3 Analysis involving new sections and diverted traffic can only be performed using the Analysis by Project method. 8

9 Project, Programs & Strategies Evaluates Many Budget Use Create Roads Users Generates Type of Constraints Existing New HDM-4 or Road Specify Unconstrained Economic Network Road Network Option Classes Standards Program Analysis Optimization Network Matrix Projects Yes - by Section No - Life-cycle None Yes No - by Project Programmes Yes - by Section Yes - Life-cycle - Maximize NPV Yes No - Multi-year Forward Programme Strategies Yes - by Section Yes - Life-cycle - Maximize NPV Yes Yes - Maximize diri - Minimize costs for target IRI 9

10 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 10

11 HDM-4 Version 2.0 Case Studies HDM-4 Case Studies Included with HDM-4 Documented on Volume 2: Application Guide Windows Folders Containing HDM-4 Workspace C:\Program Files\HDM-4\Case Studies\Eng World Bank Case Studies Provided by the World Bank C:\HDM-4 Version 2.0 WB Case Studies

12 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 12

13 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 13

14 HDM-4 Version 2.0 Structure Input Data Application Options Data Configuration Data 14

15 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 all input, application options and configuration data for a given study. 15

16 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 the following files: OBJECTS.DAT and OBJECTS.IDX, which can be copied from one Windows folder to another. 16

17 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. 17

18 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. 18

19 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 Management System or Excel. 19

20 Export and Import File Formats Road Network Export File Format.pdf Vehicle Fleet Export File Format.pdf located on C:\Program Files\HDM-4 Version 2.0\Documentation\Eng 20

21 Road Network Import Sample File 21