1

How do we decidewhich roads to fix when there is not

enough money to fix everything?

4

Outline

• Pavement condition assessment.

• Key concepts for pavement preservation.

• Selecting projects under a preservation strategy.

• Three Steps to Implement a preservation strategy for local roads.

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Surface Rating Survey

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Pavement Surface Rating

10 – 9: Excellent7 – 8: Good

6: Fair<5: Poor

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Pavement Surface Rating

10 – 9: Do Nothing8: Crack Seal7: PM Paving6: Rehab5: Major Rehab

<5: Replace

PavementSurface Rating

Ride Quality (IRI)

PavementCondition Index

(PCI)

9

9/10 – Excellent

8 - Good

7 - Good

6 - Fair

5 - Poor

4 - Poor

3 - Very Poor

172 - Very Poor

1 - Very Poor

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E-Score Hardware

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Pavement Management

Pavement Preservation Strategy

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What are we trying to do with Preventive Maintenance?

• Seal cracks to keep water out

• Rejuvenate a weathered surface

• Prolong life of the pavement

• Non-structural

5

6

7

8

9

10

Time

Con

dit io

n R

atin

g

Pavement Performance Curveand Windows of OpportunityDo Nothing

Non-Paving PM

PM Paving

Multi-Course

Major Rehab/Recon

$1

$4

$16

PM Overlay by Initial Surface Score

5

6

7

8

9

10

Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9Y10 Y11

Project Age

Surfa

ce S

core Score 6

Score 7

Pavement Management

Why does pavement preservation work?

20105 15 25 30

6

7

8

9

10

5

Years

Typical Pavement Deterioration Curvefrom Surface Score History

0

Flex/Overlay

20105 15 25 30

6

7

8

9

10

5

Years0

20105 15 25 30

6

7

8

9

10

5

Years0

20105 15 25 30

6

7

8

9

10

5

Years0

20105 15 25 30

6

7

8

9

10

5

Years0

$125k $125k $500k

20105 15 25 30

6

7

8

9

10

5

Years0

$750k $1.5M

Poor Fair Good Excel

Lane

Mile

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sWorst First

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sWorst First

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sWorst First

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sWorst First

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sWorst First

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s Worst First

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s Worst First

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s Worst First

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s Worst First

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

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Pavement Preservation

Far less expensive to keep good pavements good.

Treat the pavement early before distress becomes severe.

The time window is narrow for optimal performance.

#1

#3

PM Overlay by Initial Surface Score

5

6

7

8

9

10

Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9Y10Y11

Project Age

Surfa

ce S

core Score 6

Score 7

#2

Poor Fair Good Excel

Lane

Mile

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Key Concept of Pavement Preservation

Pavement Preservation Tools• Crack Sealing• Chip Seal• Quick-set Slurry• Microsurfacing• Paver-Placed

Surface Treatment• 6.3mm HMA• Single Course HMA• Mill and Fill• Cold Recycling

Crack Sealing

No.

Preservation Strategy

• Keep good pavement good.

• Choose the right treatment at the right time.

• Serve the most number of travelers with each dollar.

• Prioritize segments by cost effectiveness ($/VMT).

VMT

$ $$ $$

$$

“Cost Effectiveness”

$ / VMT

66

70

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Pavement Management

How do I implement a preservation strategy for

my roads?

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Step 1: Road Inventory

• Lay out Linear Reference

• Define road characteristics

• Create Rating Segments– Base on Maintenance history– Avoid short segments

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Step 2: Condition Assessment

• Choose an assessment method

• Keep it simple

• Annual or biannual cycle

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Step 3: Prioritization Strategy

• Preservation ($/VMT)

• Worst-first

• Minimum conditions

• System Tier

The End.

Rick BennettPavement Management518-485-8976rbennett@dot.state.ny.us