Pavement Management System Presentation to Township of Langley Council, June 22, 2009

The Township of Langley 2008 Pavement Management System Study

Prepared by

EBA Engineering Consultants Ltd.

Contents

• Project Background• Data Collection • Road Network Present Conditions in 2008• Road Network Assessment and Comparison to other Agencies• Highway Development and Management (HDM) Distress Prediction

Modeling• Road Network Predicted Condition in 2018 • Analysis Inputs• Analysis Results

– Road Network Predicted Condition at Current Funding Levels– Road Network Predicted Condition at Recommended Funding

Levels

Project Background

Township of Langley’s Pavement Management History• Pavement Management System Installed in 2002/2003;• The last full Pavement Condition Surveys were conducted in:

– 2005 MRN Roads (TransLink);

– 2007 Major Roads (Arterial, Collector & Grid roads);

– 2005 & 2006 Local roads (Minor roads).

The objectives of this study are:• Update analysis to reflect current construction pricing;• Analysis of Major, local and MRN roads;• Determine the optimal annual funding level that will indefinitely sustain the quality and value of the pavement network; and • Integrate all pavement condition and analysis results in the Township’s GIS;• Update the City’s in-house systems to incorporate latest work.

Pavement InventoryTownship of Langley has approximately 930 centreline km of road

(813 centreline-km of Paved road considered in analysis)

Class Length (cl-km)

MRN 59 )

Arterial 101

Collector 106

Grid 121

Local 426 )

Major Roads Analysis

Local Roads Analysis

HWY * 56RAMP 11Unsurveyed Lanes 12Unserveyed Gravel 26Unsurveyed Locals 12Total unsurveyed 117

Unsurveyed Routes

* Includes Hwy 1 EB and WB, Hwy 10, unsurveyed parts of 264 St & 264 St Diversion

MRN Roads Analysis

Township of Langley’s Road Network

Road Network Classification

Provincial Highways

MRN Routes

Arterial Routes

Collector Routes

Grid

Local Routes

Private/ new locals (Not Surveyed)

Municipal Boundary

All Cracked Area (ACA) as a Measure of Pavement Condition

Condition From ACA

To ACA

Colour

V Good 0% 1%

Good 1% 5%

Fair 5% 10%

Poor 10% 30%

V Poor 30% 100%

Data Collection

Cracking = 0 - 1 %Preventative Maintenance(crack sealing)$1.70 - $3.00/m2

Cracking = 1 - 10 %Overlay, Grind and Patch$15 - $30/m2

Data Collection

Cracking = 10 - 30%(Overlay, Grind and Patch)$30 - $40/m2

Cracking > 30%(Replace Asphalt)$40 - $65/m2

Cracking (ACA) on Major Roads – 2007/08

0 – 1% (V Good) = 133 km 40%1 – 5% (Good) = 98 km 30%5 – 10% (Fair) = 42 km 13%10 – 30% (Poor) = 50 km 15%

Avg. Cracking measured in 2007 = 5.5%

30 – 100% (V Poor) = 5 km 2% Total = 328 km

Avg. Cracking after 2008 Paving = 5.0%

Recommended Funding vs Actual (major roads)

• Average Cracking in 2000 = 5.2%• Average Cracking in 2003 = 4.7%• Recommended Funding in 2003 = $2.4 million/year• Actual Funding 2003 thru 2007 = $1.9 million/year* (average)• Measured cracking percentage in 2007 = 5.5%• Cracking % After 2008 Paving Programme = 5.0%

*31 km out of the total 328 km of Major roads were re-surfaced between the 2003 survey and the 2007 survey

Comparison to Other Agencies

How does this compare to elsewhere in terms of Cracking ??

Using the same data collection / interpretationBritish Columbia (major roads only) Km Maple Ridge (2007) 8.8 %

154Abbotsford (2003) 7.8 %

304Coquitlam (2007) 5.7 %

119Surrey (2007) 5.6 %

490Township (2008) 5.0 %

328Township (2003) 4.7 %

328New Westminster (2006) 4.6 %

28Richmond (2004) 3.7 %

98Delta (2006) 2.4 %

113

Cracking (ACA) on MRN Roads 2005

0 – 1% (V Good) = 43 km1 – 5% (Good) = 14 km5 – 10% (Fair) = 2 km10 – 30% (Poor) = 0 km

Avg. Cracking = 1.0%

30 – 100% (V Poor) = 0 km

Cracking (ACA) on Local Roads - 2008

0 – 1% (V Good) = 156 km1 – 5% (Good) = 125 km5 – 10% (Fair) = 38 km10 – 30% (Poor) = 72 km

Avg. Cracking = 8.8% *

30 – 100% (V Poor) = 35 kmTotal = 426 km

* Predicted condition in 2008

based on 2005/06 data

13 Years10 Years 20 Years

Analysis Inputs

Example Pavement Strategies (combinations of treatments)

Analysis Inputs

Using Life Cycle Cost Analysis Evaluated Several Strategies for Each Pavement Segment

• Strategy is comprised of combinations of individual treatments and treatment application timings

• For a given pavement there are hundreds potential preservation strategies.

Major Roads Patching & Potholing Costs

$0

$200,000

$400,000

$600,000

$800,000

$1,000,000

$1,200,000

$1,400,0002

00

8

20

09

20

10

20

11

20

12

20

13

20

14

20

15

20

16

20

17

20

18

20

19

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20

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20

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20

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20

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20

25

20

26

20

27

Year

An

nu

al M

ain

ten

an

ce

Co

sts

$1.5 million

$2.0 million

$3.0 million

$3.5 million

$4.0 million

Analysis Results – Major Roads Deterioration

9%

16%

4%

6%

20%

Cracking (ACA) %

$2.0mill

$3.0 mill

$3.5 mill

$4.0 mill

$1.5 mill

Recommended

Recommended

Actual Spending on annual maintenance for major roads is @ $250,000/ year

Pre

dic

ted

Local Roads Patching & Potholing Costs

$0

$200,000

$400,000

$600,000

$800,000

$1,000,000

$1,200,0002

00

8

20

09

20

10

20

11

20

12

20

13

20

14

20

15

20

16

20

17

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18

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20

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20

22

20

23

20

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20

25

Year

An

nu

al M

ain

ten

an

ce

Co

sts

$2.5 million

$3.0 million

$ 3.5 million

$ 4.0 million

Analysis Results – Local Roads Deterioration

4%

11%

15%

Cracking (ACA) %

$3.0 mill

$3.5 mill

$4.0 mill

$2.5 mill

Recommended

Recommended

7%

Actual spending on annual maintenance for local roads is

@ $250,000/ year versus required $500,000/ year shown

Pre

dic

ted

Cracking (ACA) on Major & Local Roads

2009 - 2025

Predicted condition in 2009 - 2025

Major: $2.0 million/ year

Local: $2.0 million/ year

Annual Spending: $4.0 million/ year

Cracking (ACA) on Major & Local Roads - 2009

0 – 1% (V Good)1 – 5% (Good)5 – 10% (Fair)10 – 30% (Poor)30 – 100% (V Poor)

*Avg. Cracking = Major 5.0 %

= Local 8.8 %






= Local 9.3 %






= Local 9.7 %






= Local 10.2 %






= Local 10.6 %






= Local 11.1 %






= Local 11.6 %






= Local 12.0 %






= Local 12.7 %






= Local 13.4 %






= Local 14.0 %






= Local 14.9 %






= Local 15.8 %






= Local 16.7 %






= Local 17.4 %






= Local 18.1 %






= Local 19.1 %



Cracking (ACA) on Major & Local Roads2025

Predicted condition in 2025

Major & Local: $500,000/ year

Annual Spending (Do Minimum) :



*Avg. Cracking = Major 26.3%

= Local 30.2%

* Predicted condition in 15 years

Annual Spending: $500,000/ year

Pavement Asset Value

Pavement Type Replacement 2008 Value 2018 Value (Recommended Budget)

MRN Roads $ 74 million $ 66 million $ 66 million (at $1.3 million/ Year) Major Roads $151 million $136 million $133 million (at $4.0 million/ Year) Local Roads $110 million $ 85 million $ 85 million (at $4.0 million/ Year)

$335 million $287 million $284 million •Recommended MRN Road Funding : 1.8% of Asset Value

•Recommended Major Road Funding : 2.7% of Asset Value

•Recommended Local Road Funding : 3.6% of Asset Value

Roads in good condition can be managed for between 2% and 2.5% of asset value

The local road funding could be reduced to $2.8 million/year once cracking is reduced to 4%

For Discussion

Original GroundOriginal Ground

Excavation and CompactionExcavation and Compaction

Calculating Pavement Value

SubbaseSubbaseBaseBase

AsphaltAsphalt

Pavement value =Pavement value =

Cost of Excavation and Compaction +Cost of Excavation and Compaction +

cost of Subbase + cost of Base + cost of Asphaltcost of Subbase + cost of Base + cost of Asphalt

With time and traffic, pavement layers deteriorate

FailureFailureRuttingRutting

CrackingCracking

Calculating current pavement asset value

crackingcracking New AsphaltNew Asphalt

Original Pavement value Original Pavement value minus the cost in the cost in any given year to restore the pavement to as any given year to restore the pavement to as new conditionnew condition

Pavement Asset Value

Pavement Type Length Replacement 2008 Value• MRN Roads 59 km $ 74 million $ 66 million• Major Roads 328 km $151 million $136 million• Local Roads 426 km $110 million $ 85 million

813 km $335 million $287 million

Distress Prediction Modeling

World Bank Pavement Performance - Distress Prediction Modeling

•StructureStructure

•AgeAge

•TrafficTraffic

•EnvironmentEnvironment

•ConditionCondition

Crack Crack InitiationInitiation

Rutting Rutting

Crack Crack ProgressionProgression

RoughnessRoughness

Pot HolesPot Holes

RavelingRaveling

Analysis Inputs

Maintenance / Rehabilitation Treatments and Costs UsedTreatment Unit Cost• Crack Sealing $ 2.25/L-m• Skim Patching $14.00/m2

• Surface Treatment $ 8.00/m2

• Overlay (50 mm) $15.00/m2

• Grind and Patch (40 mm) $22.00/m2

• Grind and Patch (75 mm) $27.00/m2

• Mill/ Inlay (50 mm) $20.00/m2

• Reclaim $40.00/m2

• Reconstruction $60.00/m2

• Subsequent Rehabilitations $15.00/m2 (no curb)$20.00/m2 (with curb)

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Pavement Management System Presentation to Township of Langley Council, June 22, 2009

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