ASECAP, Pula 2006, Presentation, Radovic Nebojsa

8/10/2019 ASECAP, Pula 2006, Presentation, Radovic Nebojsa

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OPTIMISATION OF MOTORWAY

MAINTENANCE MANAGEMENT Case Study: motorway E-75,section Novi Sad - Belgrade

34 th Study and Inform ation Days o f ASECAP, Pula, 21-24 May 2006

Neboj a Radovi, M.Sc. (C.E.)


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234 th Study and Information Days of ASECAP, Pula 21-24 May 2006

1. Introduction2. Scope of Analyses3. Applied Methodology4. Calibration of HDM-4 model5. Maintenance Standards6. Vehicle Fleet Characteristics7. Motorway Road Network Rehabilitation Program

Analyses8. Case Study: E-75, Section Novi Sad Belgrade9. Conclusions

Agenda


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1. In t ro d uc t ion

Motorways presents a main arterials of road transportsectorPavement quality have a direct impact on the safety anddriving comfort as well as on the travel time spent, andconsequently, on the total road users costs.

Motorway pavement maintenance cost participate up to80% of total motorway maintenance costsIn Serbia motorway maintenance cost apprx. 30,000Euro/km/year (motorways) and apprx. 22,000Euro/km/year (semimotorways)

Improve pavement condition of existing road network ofRepublic of Serbia as a basic task of Public EnterpriseRoads of Serbia


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2. Sco p e of A n aly s es ...

Analyses comprised:

579.84 km of motorway road network of the Republicof Serbia

4 motorway road routes 57 semimotorway and motorway sections accordingto road reference system

only the sections with bituminous pavement havebeen analyzed


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2. Sco pe of A nalys esFeature Total Motorway Road

Network Considered

Total number of sections: 57

Total length: 579.84 km

Average length of sections: 10.17 km

Average AADT (vpd): 10,155 vpd

Average pavement width: 18.50 m

Average CBR: 6.8 %

Average rut depth: 30.4 mm

Average share of cracked area: 3.7 %

Average share of raveled area: 0.7 %

Mean value IRI (m/km): 3.7 m/km

IRI - maximal value (m/km): 4.9 m/km

IRI - minimal value (m/km): 2.2 m/km

IRI - standard deviation (m/km): 0.57 m/km

IRI - variance coefficient: 0.33 m/km

Average IRI weighted by length (m/km/km): 3.6 m/km/km


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3. A p p l ied m eth o d olo g y...

A study of motorway network level road rehabilitationprogram analysis was done using HDM-4 model.Period of analysis : 20 yearsDiscount rate: 12%Traffic grow rates were defined by Faculty of Transport

and Traffic Engineering - University from BelgradeThe maintenance and rehabilitation strategies applied inanalysis are determined on the basis of expecteddeterioration in relation to actual traffic load.Pavement roughness is expressed in terms of

"International Roughness Index" (IRI), and normalizedaccording to recommendations of World Bank.Dynamic segmentation was used to definehomogenious sections


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3. A pp l ied m ethod olog y

Pavementcondition

Pavement Description IndicativeIRI

Applies during

GOOD Free of defects, require only routinemaintenance

1.5 to 4 First 5-7 years, there is provided a goodroutine maintenance

FAIR Significant defects requireresurfacing or strengthening to avoidfailure.

4 to 6 First 7-12 years, pavement may stay infair condition for few years more, butroad user cost pit a pat arise

POOR Extensive defects. Failure isoccurring or already occurred.Reconstruction is required.

6 or more First 12-15 years, once failed, seriousdeterioration and destruction rapidlyoccur

Normalized IRI (m/km):

Typical pavement structure is designed for service life of20 years, but in practice, some resurfacing is needed after10-12 years.


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4. Calib rat ion o f HDM-4 m o d el

Calibration for local climate characteristics

Calibration of Pavement Deterioration Model

Calibration of Vehicle Fleet CharacteristicsCalibration are followed by comprehensive sensitivityanalyses

Parameter Ad opt ed values

Mean monthly precipitation 70

Mean temperature 10 C Average temperature range 40 C Number of days per year temperature exceeds 32 C 25 days

Freezing index 75 C -days


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5. Veh ic le Fleet Ch aract eris t ic s" Analysis on the Representative Vehicle Characteristicsin the Arterial Road Network of the Republic of Serbia' 'made by Faculty of Transport and Traffic Engineering,University of Belgrade

Basic vehicle type Numberof

wheels

No. ofshafts

AnnualK m

Annualnumber of

workinghours

Averageshelf l ife

(years)

Number ofpassengers

ESAL Weight(t)

Small-size passengercar 4 2 12,000 500 14 2 1.02 4

Medium-size passengercar 4 2 16,000 500 15 2 1.14 4

Bus 6 2 80,000 2,000 14 45 14.40 6

Light cargo vehicle 6 2 40,000 2,000 14 0 3.26 6

Medium-size cargovehicle 6 2 40,000 2,000 14 0 6.72 6

Heavy cargo vehicle 10 3 55,000 2,000 14 0 14.02 10

Truck trailer 18 5 80,000 2,000 15 0 36.10 18


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6. Main ten anc e Stand ard s ...

Different maintenance strategies forrehabilitation/reconstruction of pavement were takeninto considerationThere are two alternatives: basic option, the alternatives with minimum maintenance works

(crack sealing and pothole patching), rehabilitation option, determined as work

rehabilitation/reconstruction programme according to adoptedcriteria.

Maintenance standard StandardCode

Unit Econ.Price

()

Finan.Price

()

Triggercriteria

Achieved effects

1 POTHOLE PATCHING POTPAT m 2 6.6 8.3 every year Pothole patching 80%2 CRACK SEALING CRKSL m 2 3.2 4.0 every year Wide and transversal

cracks 80%


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6. Main ten an c e Stan d ard sMaintenance standard Standard

Code

Unit Econ.Price ()

Finan.Price ()

Trigger criteria Achieved effects

1 POTHOLE PATCHING POTPAT m 2 6.6 8.3 each year Pothole patching 80%2 CRACK SEALING CRKSL m 2 3.2 4.0 each year Wide and transversal

cracks 80%3 THIN AC OVERLAY,

d=30 mmTHIN30 m 2 7.8 9.4 Total area damaged

> 15% and rut < 25mm and cum . SAL 15% and rut 25-40mm and cum . SAL25%and cum ESAL 2x10 6

IRI=derived,Total damaged area =0%Mean rut depth =0mm

7 AC OVERLAYd=70+50=120mm

OVL120 m 2 23.8 28.6 IRI 5.0 and cumESAL >2x10 6


8 PAVEMENTRECONSTRUCTIONd=50+70+300=420mm

PAVREC m 2 31.7 38.0 IRI 6.0 and cumESAL >2x10 6



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7. Moto rw ay Ro ad Netw o rkReh ab i l i tat io n Prog ram A n alys es ...

Average Economic Internal Rate of Return (EIRR) persection is EIRR = 37.6%. The range of achieved EIRR isfrom 10.3% to 87.6% .Total Net Present Value (NPV) is NPV= 360.6 millionsEUR.The average pavement condition in year 2022 in case ofbase alternatives (do minimum) will be IRI=9.8 / The average pavement condition in case ofrehabilitation alternatives will be IRI=2.9 / Total cost of maintenance works in case of rehabilitationoptions is estimated to be 302.6 millions EUR.


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7. Moto rw ay Ro ad Netw o rkReh ab i l i tat io n Prog ram A n alys es ...


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8. Cas e Stud y : m o to rw ay E-75,s ec t io n No v i Sad - B elg rade...

A two homogenious sections has been defined: Novi Sad Beska, l=35.3 km Beska Beograd, l=30.2 km

An optimal maintenance program has been defined forboth carriageways separately divided into homogeneoussectors.


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8. Cas e Stud y : m o to rw ay E-75,sect ion Nov i Sad - B elgrade

Total pavement maintenance costs for bothcarriageways in analyses period is estimated to:53,800,209 .Optimal rehabilitation works should be carried out on theexisting (left) carriageway on homogeneous sector NoviSad Beska during the 2004 and 2020.Optimal rehabilitation works should be carried out on theexisting (left) carriageway on homogeneous sector

Beska Beograd during the 2004, 2013 and 2023.Optimal rehabilitation works should be carried out on thenew (right) carriageway on homogeneous sectors NoviSad Beska and Beska Beograd during the 2014.


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9. Co nc lus ion s

A procedure for collection and processing of pavementdistress data with video-camera has been investigatedand veryfied.

A procedure for determining of homogeneous section-

links to be involved in the using of decision model HDM-4, has been defined and verified. Adaptation and calibration of worldwide popularmaintenance management model HDM-4 for local

conditions in Serbia has been accomplished. A technical-economic analyze of pavement rehabilitationneeds on motorway road network in Republic of Serbiausing calibrated HDM-4 model has been comprised.


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1834 th Study and Information Days of

ASECAP Pula 21-24 May 2006

Thank you for your attention!

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ASECAP, Pula 2006, Presentation, Radovic Nebojsa

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