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 Inventory
Township of Langley has approximately 930 centreline km of road
(813 centreline-km of Paved road considered in analysis)
Major Roads Analysis Local Roads Analysis * Includes Hwy 1 EB and WB, Hwy 10, unsurveyed parts of 264 St & 264 St Diversion MRN Roads Analysis 426 ) Local 121 Grid 59 ) MRN 106 Collector 101 Arterial Length (cl-km) Class

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 100% 30% V Poor 30% 10% Poor 10% 5% Fair 5% 1% Good 1% 0% V Good Colour To ACA From ACA Condition

Data Collection Cracking = 0 - 1 % Preventative Maintenance (crack sealing) $1.70 - $3.00/m 2 Cracking = 1 - 10 % Overlay, Grind and Patch $15 - $30/m 2

Data Collection Cracking = 10 - 30% (Overlay, Grind and Patch) $30 - $40/m 2 Cracking > 30% (Replace Asphalt) $40 - $65/m 2

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 / interpretation
British Columbia (major roads only) Km
Maple Ridge (2007) 8.8 % 154
Abbotsford (2003) 7.8 % 304
Coquitlam (2007) 5.7 % 119
Surrey (2007) 5.6 % 490
Township (2008) 5.0 % 328
Township (2003) 4.7 % 328
New Westminster (2006) 4.6 % 28
Richmond (2004) 3.7 % 98
Delta (2006) 2.4 % 113

Cracking (ACA) on MRN Roads 2005 0 – 1% (V Good) = 43 km 1 – 5% (Good) = 14 km 5 – 10% (Fair) = 2 km 10 – 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 km 1 – 5% (Good) = 125 km 5 – 10% (Fair) = 38 km 10 – 30% (Poor) = 72 km Avg. Cracking = 8.8% * 30 – 100% (V Poor) = 35 km Total = 426 km * Predicted condition in 2008 based on 2005/06 data

Analysis Inputs Example Pavement Strategies (combinations of treatments) 13 Years 10 Years 20 Years

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.

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 Predicted

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 Predicted

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) Annual Spending: $4.0 million/ year *Avg. Cracking = Major 5.0 % = Local 8.8 % * Predicted condition in 2009

Cracking (ACA) on Major & Local Roads 2025 Predicted condition in 2025 Major & Local: $500,000/ year Annual Spending (Do Minimum) :

Cracking (ACA) on Major & Local Roads - 2025 0 – 1% (V Good) 1 – 5% (Good) 5 – 10% (Fair) 10 – 30% (Poor) 30 – 100% (V Poor) Annual Spending: $500,000/ year *Avg. Cracking = Major 26.3% = Local 30.2% * Predicted condition in 15 years

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

Calculating Pavement Value Pavement value = Cost of Excavation and Compaction + cost of Subbase + cost of Base + cost of Asphalt Original Ground Excavation and Compaction Subbase Base Asphalt

With time and traffic, pavement layers deteriorate Failure Rutting Cracking

Calculating current pavement asset value cracking Original Pavement value minus the cost in any given year to restore the pavement to as new condition New Asphalt

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
Structure
Age
Traffic
Environment
Condition
Crack Initiation Rutting Crack Progression Roughness Pot Holes Raveling

Analysis Inputs Maintenance / Rehabilitation Treatments and Costs Used
Treatment Unit Cost
Crack Sealing $ 2.25/L-m
Skim Patching $14.00/m 2
Surface Treatment $ 8.00/m 2
Overlay (50 mm) $15.00/m 2
Grind and Patch (40 mm) $22.00/m 2
Grind and Patch (75 mm) $27.00/m 2
Mill/ Inlay (50 mm) $20.00/m 2
Reclaim $40.00/m 2
Reconstruction $60.00/m 2
Subsequent Rehabilitations $15.00/m 2 (no curb)
$20.00/m 2 (with curb)

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

by jgabateman on Jun 22, 2009

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