the benefits of refining the road maintenance intervention ... presentations/session 7/1100 … ·...

The benefits of refining the road

maintenance intervention

strategy - Reprise

Presented by Jason Eggleton – Bituminous Products Sales Manager

PRESENTATION OUTLINE

• Introduction

• Review of 3 x NZ Councils

• Pavement Defect Lifecycle

• Proactive Preventative Maintenance

• Reinvesting Proactive Preventative Maintenance Savings

• Benefits of a Proactive Preventative Maintenance Program

INTRODUCTION

• Original 2009 paper analysed Road Maintenance spending

across 3 NZ Councils

• Result showed Councils were reactive with road maintenance

expenditure

• Data remodelled using Proactive Maintenance Strategy &

showed significant cost savings.

• Reprised Paper looks at results of reinvesting Proactive

Maintenance Strategy cost savings

REVIEW OF 3 X NZ COUNCILS

• Total Maintenance Spend = NZ$22mil pa

• Corridor Maintenance Spend = NZ$8.3mil pa

• 2094klm Network size had Sealed Pavement Maintenance

Spend = NZ$3.9 mil pa

• Pothole Repairs NZ$ 224,000 5.8%

• Seal (Crack) Repairs NZ$ 58,000 1.5%

• Surface Repairs NZ$ 129,000 3.3%

• Structural Repairs NZ$ 3,049,000 78.1%

• Other NZ$ 441,000 11.3%

CLASSIFICATION OF MAINTENANCE EXPENDITURE

PROACTIVE

REACTIVE

Seal Repair 1.5% +

Pothole Repair 5.8%

Surface Repair 3.3%

Structural Repair 78.1%

PAVEMENT DEFECT LIFECYCLE

Repairs done early in the Pavement Defect Lifecycle are the

repairs that cost the least in time & money to complete.

Seal

Repair

Pothole

Repair

Surface

Repair Structural

Repair

Small Repair Medium Repair Large Repair

TIME & COST

0.5m2 CROCODILE CRACKING

0.5m2 Crocodile Cracking

repaired early in the Defect

lifecycle using BRP Road

Patch

Total Repair Cost NZ$40

0.5m2 Crocodile cracking

left untreated lead to

6 pothole repairs, 2m2 AC

leveling & 9m2 dig-out

Total Repair Cost NZ$619

Proactive Maintenance Reactive Maintenance

IS REACTIVE MAINTENANCE ACCEPTABLE?

WHAT DO WE GET FROM BEING PROACTIVE?

• Time and Material Cost Savings from treating defects early in

the Pavement Defect Lifecycle when there the quickest and

cheapest to complete

• Maximise the lifespan of the pavement by protecting the

waterproof integrity of our pavements

• Reduce the wasting of resources caused by

• Substandard repairs

• Incorrect repair choices

• the need for repeat repair visits

PROACTIVE PREVENTATIVE MAINTENANCE

Seal

Repair

Pothole

Repair

Surface

Repair

Structural

Repair

Small Repair Medium Repair Large Repair

TIME & COST

Lets analyse the results of completing 1 in 5 (20%) repairs, 1 step

earlier in the Pavement Defect Lifecycle?

1 IN 5 REPAIRS DONE 1 STEP EARLIER

Repair Type 3 NZ

Council #

of Repairs in

2007/2008

1 in 5

repairs #

(20%)

1 in 5 Repairs

done 1 step

earlier

Proactive

Preventative

Maintenance

# of Repairs

Pothole Repairs 7,435 59 7,494

Seal Repairs 145 59 204

Surface Repairs 585 118 496 965

Structural

Repairs

2,482 496 1,988

1 in 5 (20%) repairs done 1 step

earlier realised savings of

NZ$501,514 or 12.8% of

expenditure

Unit Average

Rate

Av era g e Quantity per site

Cost per repair

Number pa Annual Cost

Pothole Repairs ea $30.23 1.0 $30.23 7,4 9 4 $22 6 , 5 29

Seal Repair ( Crack s)

m $7.02 57.0 $400.1 6 2 04 $ 81 , 4 28

Surface Repair m 2 $28.01 7.9 $221.32 96 5 $ 213, 534

Structural Repair

m 2 $42.45 28.95 $1,228.81 1,98 8 $ 2,4 43 , 108

Other $441,85 3

Total $3,4 0 6 , 452

Previous

total $3,90 7 , 966

Savings $ 50 1 , 514

1 IN 5 REPAIRS DONE 1 STEP EARLIER

REINVESTING PROACTIVE PREVENTATIVE MAINTENANCE

SAVINGS

Year 1 revealed

• $501,514 cost savings from being proactive

• With the savings reinvested

• Expenditure remains unchanged

• Number of Repairs increases by 5129 from 10650 to 15779

(savings reinvested evenly across the 4 main repair types)

• Avg Repair Cost reduces from $325 to $220


SAVINGS

Year 2 revealed

• $423,068 cost savings from being proactive



• Number of Repairs increases by 4327 from 15779 to 20107




SAVINGS

Year 3 revealed

• $356,891 cost savings from being Proactive



• Number of Repairs increases by 3650 from 20107 to 23,757



REINVESTING PREVENTATIVE MAINTENANCE SAVINGS

BUDGET IMPACT

$3,907,966 $3,907,966 $3,907,966 $3,907,966

$0

$1,000,000

$2,000,000

$3,000,000

$4,000,000

3 NZ Shire - Sealed Pavement

Maintenance Expenditure

Year 0 Year 1 Year 2 Year 3


AVG REPAIR COST IMPACT

$325

$220$172

$146

$0

$100

$200

$300

$400

3 NZ Shire - Sealed Pavement Avg Repair

Cost



NUMBER OF REPAIRS IMPACT

10,650

15,779

20,10723,757

0

5000

10000

15000

20000

25000

3 NZ Shire - Sealed Pavement Number of

Repairs PA



IMPACT

BUDGET

REPAIR #

AVG REPAIR

COST

TIME

#

BENEFITS OF A PROACTIVE PREVENTATIVE MAINTENANCE

PROGRAM

• Intervene earlier & maintain, if not improve the network quality

and

• Spend the same money

• Reduce the average cost of repairs

• Increase the number of repairs done.

• Increased Road Maintenance Personnel Safety

• Increased Road Maintenance Personnel Job Satisfaction

• Increased Road User Satisfaction

• Increased Road User Safety

• Reduce Environmental Impact

ACKNOWLEDGEMENTS

• This presentation would not have been possible without the

support of

• A J Broom Road Products

• Downer Australia

• Franklins District Council NZ

• Hutt City Council NZ

• OPUS International Consultants (Pukekohe Office) NZ

• Porirua Council NZ

the benefits of refining the road maintenance intervention ... presentations/session 7/1100 … ·...

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