25 nov pi planning using hdm moldova

Design and Implementation of Road Maintenance Reform. Republic of Moldova

Hamid Zarghampour2010-11-25

Moldova

Planning using HDM


Asset Management today Set Goals and Objectives Collect Inventory and Condition Data Rates of Deterioration Performance Standards & Measures Life-Cycle Cost Analysis Investment Strategies Programs, Projects, and Practices Monitoring Feedback and Adjustments


ManagementOrganisation

Information/ Data

Road worksEffect

RoadDeterioration

HDM 4

1 5432


RequirementsNeeds

Prioritized needs Programme Annual Activities

Existing plans, Strategies

Policies

Government, Users, Interested parties, etc.

NeedsPDS

Requirements andPrioritized NeedsThis is what RAattempt to do

ProgrammeThese are RA’s

modes/Procedures

Action PlanRA Activities

this year

Management Information PresentationPlanningCompetences

1 5432

Goals and Objectives

“Doing things right”

“Doing right things”


ManagementOrganisation

Information/ Data

PresentationTechnique

Case Studies HDM 4

1 5432


HDM 4 Management cycle

HDM 4 Maintenance Management Management Function and HDM4 Structure of HDM4 Technical analysis tools within HDM 4

Road Engineering from Art to Science Road Deterioration concept and models in HDM 4 Road Works Classification in HDM 4 Road works Effects

Economy DHM 4, Economical Indicators


0-500 500-15001500-40004000-7000 7000-0

20

40

60

80

100

120 Important Elements in the plan: Name of section Geographical location LengthType of works Cost estimates Timing of workTraffic

Packaging appropriatemix of Road works

with regards to available budget

Vägm arkering

V ägtrum m or

Bergarbeten, borrn ingsprängning M ätn ing av

vägytans tills tånd

S länterE rosionsskydd

B eläggning

Bärlager

Förstärkn ingslager

T jä lsskyddU ppfrysande b lock

Ö verbyggnadm ateria lva l och d im ensionering

Terrassm ateria lAvvattn ingD ränering

B ärighetsm ätn ingFa llv iktsdeflektom eter

April- September

AugustOctober

December- March

March - October

September- NovemberNew plan

November- December

August-October

Road Class

Paved Roads Unpaved Roads

Good Fair Poor Bad Good Poor Bad National Roads 4 6 8 >8 - - -Secondary 5 7 9 >9 6 8 10


HDM 4, Tool for Road AM Maintenance Management

Planning: Estimation of expenditure Forecasting of various budget vs. road development Policy making, dialog with financier (Government)

Programming: Estimation of expenditure for different works and

activities Key aspect of programming is prioritization of work Find the best use of the constrained budget Multi-year works and expenditure program Cost-benefit analysis are required


HDM 4, Tool for Road AM Maintenance Management

Preparation: Short term planning Road schemes are packaged for implementation Designs are refined and prepared in more detail Bills of quantities and detail costing are made Detailed cost-benefit is carried out to confirm the feasibility

project Operation:

Refers to the on-going activities scheduling of works such as monitoring in terms of: labour,

equipment and materials and recording of works completed, etc...


Change in Management ProcessActivity Time horizon Spatial Coverage Information Mode of

computer Operation

Planning Long term(Strategic)

Network Wide Coarse Summary Automatic

Programming

Medium term(Tactical)

NetworkSub Network

Preparation Budget Year Scheme LevelSection

Operation Immediate/Short term

Scheme LevelSub Section

Fine/detailed

Interactive

IQL


Information, Data What kind of information do we need?

It is always dependent on: What decisions do we need to make? What information/data are required to make these

decisions? Can we afford to collect the data? If it needs updating, can we afford to keep data current over

time?

Guiding Principle Collect only the data you need! Collect it only when you need to! The level of detail should be appropriate for the decisions

being made: Network level data for network level analyses project level for project level analyses


Management function and HDM 4

Management

Function

Common description HDM 4 Application

Planning - Strategic Analysis System- Network Planning- Pavement Management System- Programme analysis System

HDM 4Strategy Analysis

Programming -Pavement Management System-Budgeting System

HDM 4Programme

Analysis

Preparation - Project Analysis System. Pavement Management System- Pavement/Overlay design System- Contract procurement System

HDM 4 Project Analysis

Operation - Project Management System- Maintenance Management System- Equipment Management System- Financial Management/Accounting System

Not addressed by HDM


Structure of HDM 4 Core Data Objects in HDM 4 are defined in

the following data managers: HDM-4 Configuration

Defines the default data to be used in the applications Road Network

Defines the characteristic of road sections Vehicle fleet

Defines the characteristic of the vehicle fleet Road works

Defines Maintenance and improvement standards incl. unit costs


Technical analysis within HDM 4 Road Deterioration (RD)

Predicts pavement deterioration for: Bituminous Concrete and Unsealed roads

Works Effects (WE) Simulates:

The effects of road works on pavement condition Determine the corresponding costs


Technical analysis within HDM 4.. Road User Effects (RUE)

Determines: Costs of vehicle operation Travel time Road accidents (only in the CBA)

Social and Environment Effects (SEE) Determines:

The effects of vehicle emissions Energy consumption


HDM 4 processes for analysis

CalculateAnnual effects and

costs

CalculateRoad

deterioration

CalculateRoad

User EffectVOC, time, etc

CalculateSocial and

EnvironmentalEffects

Calculate Road Works

Effect s

Add ExogenousCosts andBenefits

Return


Road Deterioration


Road Engineering from Art to Science

q

Experience1900-1960

CBR

60-AASHTO

70-Mechanistic

approach80-HDM III

90-FEM ”Pavement history”

“Homogenous sections”


Vägm arkering

Vägtrum m or




Beläggning

Bärlager





Bärighetsm ätn ingFallv iktsdeflektom eter

Road Construction today


Vägm arkering

Vägtrum m or




Beläggning

Bärlager





Bärighetsm ätn ingFallv iktsdeflektom eter

Climate

Traffic

Design Criterion Wear Stability Deformation, (plastic) Fatigue Frost heave action, etc…

Road Construction today


Road Deterioration concept in HDM 4: is a function of:

original design material types construction quality traffic volume and axle loading road geometry pavement age environmental condition maintenance policy pursued


Rate of wear: is a function of:

Mix design Material quality (BM value) Studded tires Speed Carriage width


Fatigue: is mostly caused by:

heavy vehicles Other reasons:

If it is occurred on early stage after reconstruction, construction service life is ended not good enough mix design inadequate bearing capacity etc…


Frost heave action


Bearing Capacity


Plastic deformation


Bleeding


Ravelling


Cracking


Separation


HDM-4 Deterioration Models


Scope of modeling road deterioration Physical environments

Climatic Zones Pavement

Rigid concrete wide range of flexible pavements Unsealed pavement

Drainage effects shoulders deterioration, (effects on pavement strength)


Classes of Models Mechanistic

use sound fundamental theories of soil mechanic to predict pavement behavior

Empirical based on statistical analysis of locally deterioration trends

Structural mechanistic-empirical approach based on identifying the functional form and primary variables

from external sources statistical techniques to quantify their impact


Pavement Classification System (Bituminous Pavement) Pavement Type

Asphalt Mix on Asphalt Base

Asphalt Mix on Granular Base

Asphalt Mix on Stabilized Base

Asphalt Mix on Pavement Base

Surface Type Asphalt Concrete Hot Rolled Asphalt Polymer Modified asphalt

dressing Rubberized Asphalt Concrete Cold Mix Porous Asphalt Stone Mastic Asphalt


Pavement Classification System (Bituminous Pavement)

Pavement Type Surface Treatment on Asphalt

Base Surface Treatment on Granular

Base Surface Treatment on Stabilized

Base Surface Treatment on Pavement

Base

Surface Type Single Bituminous Surface

Dressing Double Bituminous Surface

Dressing Cold Mix Cape Seal Slurry Seal Penetration MacAdam


Modeling Framework

For each pavement type: a generic model applies to describes the pavement

deterioration After maintenance treatments:

the generic pavement type can change Pavement Strength:

is characterized by “Adjusted Structural Number” (SNP) The SNP applies a weighting factor (prevent over-

prediction of pavement strength with increase of depth) Construction Quality:

Construction Defect Indicators: CDS (surface) and CDB (Base) CDS: 0.5-1,5 from brittle to soft depending on Binder content CDB: 0-1,5, No defects or several defects


ConcreteJoint spalling


Road Works Bituminous Pavement


Road Works classification Routine Maintenance Periodic Maintenance Special Works Improvement Works Construction Works


Routine Maintenance Routine Pavement

Patching Edge-repair Crack sealing Spot-re-gravelling Shoulders repair,

etc.

Drainage Culvert repairs Clearing side drains,

etc… Routine Various

Vegetation control Markings Sign, etc…


Periodic Maintenance Preventive Treatment

Fog seal Rejuvenation

Rehabilitation Thick overlay Mill and replace Inlay

Resurfacing Surface dressing Slurry seal Cape seal Thin overlay, re-

gravelling

Reconstruction Partial reconstruction Full pavement

reconstruction


Special Winter

Snow removal Salting/gritting,

etc…

Emergency Cleaning debris Traffic accident removal,

etc.. Repairing/washout


Improvement Widening

Partial widening Lane addition

Realignment Horizontal and vertical

geometric improvement Junction improvement

Off-carriageway Shoulders addition Shoulders upgrading NMT lane addition Side drain improvement,

etc…


Construction Upgrading

Chang of surface Class Unsealed surface to

Bituminous Bituminous to Concrete

Pavement

New Section


Outputs Pavement deterioration and road works

Summary of annual pavement condition Quantities of road works Details of annual road work costs Schedule of road works

Road user effects Summary of Road User Cost Average traffic speed Vehicle speed and capacity ratio Vehicle emission Energy consumption


Outputs Economical Indicators

Annual cost streams Discounted cash flows Net Present Value (NPV) Economic Internal Rate of Return

(IRR) Benefit Cost Ration (BCR) First Year Benefit (FYB)


Outputs… Net Present Value (NPV)

The higher NPV the higher Benefit Without budget constrain, shall the alternative with highest NPV be

chosen

Comments Larger investment tends to have higher NPV NPV is proportional to the project cost if IRR is the same

Economic Internal Rate of Return (IRR) IRR = the discounted rate at which the NPV is equal to 0 Gives no indications of the size of costs or benefits of an

investment Acts as a guide to the profitability of the investment The higher the better If IRR > Discount rate, the investment is said to be economically

justified


Outputs… Benefit Cost Ration (BCR)

Ratio indicating the profitability of one option relative to base option

Gives no indications of the size of costs or benefits of an investment

First Year Benefit (FYB) FYB is defined as the ratio in present of the net benefit

realized in the first year after construction Rough guide to project timing

If FYB > discounted rate, the project should go ahead If FYB < discounted rate the project should be delayed until it

satisfies the criterion


Asset Management today Set Goals and Objectives Collect Inventory and Condition Data Rates of Deterioration Performance Standards & Measures Life-Cycle Cost Analysis Investment Strategies Programs, Projects, and Practices Monitoring Feedback and Adjustments


For any kind of planning (programme, Project)!

We need Data/Information:

Road Network

Work standards

Traffic data (Vehicle Fleet)


1 december 2010We need to prepare

- More than 1? If så:- SPECIFY

- Visualising section’s conditions- Map (GIS)-

-Veify -Cost estimates-Maintenance activities

-Routine-Periodic

- Rehabilitation- Terminology

- VF available- Previous studies?


GISData collection

Evaluation

0-500 500-1500 1500-40004000-7000 7000-0

20

40

60

80

100

120

Systems

Asset EvaluationCost-BenefitsMinistry, RA, RU

Condition Data and analysis

Visual inspections


0-500 500-1500 1500-40004000-7000 7000-0

20

40

60

80

100

120

Condition Data and analysis

Need for Inspection Manual- Will be recommended

IRI-For this study:- 900 km of:-National and Secondary roads

- Analysis tool- HDM 4

- Overview next week:- Programme- Project

•Modelling RN•Review results•Writing report

Next week

Script for selection of Homogenous sectionsis available

25 nov pi planning using hdm moldova

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