NEAUPG - October 2004 Carlos Rosenberger · 20 #60 scratch course 211 ton 34.00$ $7,174 $2,237 20...
Transcript of NEAUPG - October 2004 Carlos Rosenberger · 20 #60 scratch course 211 ton 34.00$ $7,174 $2,237 20...
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NEAUPG - October 2004 Carlos Rosenberger
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16 22 $99 16,000 88
333 66 $12 56
10 $653 88,000 45
27 2,500 $3 500
2 300 105 $1,000,000
18 $23 500,000 1
You are going to see a lot of numbers, don’t worry aboutspecific numbers, it is the concept
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Pavement Type Selection TeamPavement Type Selection TeamFinal Report
Maryland State Highway Administration
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Pavement Selection Flow ChartLCCA
DifferenceLess than
10%
Pavement Selection Team&
Matrix
UseInnovative
Contracting
Proceed with SelectedPavement Type
Proceed with Selected PavementAlternatives & Innovative
Contracting
Follow Pavement DivisionProcedures
NO
YES
YES
NO
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Publication No. FHWA -SA-98-079
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Equivalent Initial Equivalent Initial Pavement Thickness Pavement Thickness
DesignsDesigns
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Conditi on
Year (typically 40 years)
ANALYSIS PERIOD
PerformancePeriod
LIFE CYCLE ANALYSIS
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COST
TIME
NET PRESENT VALUE
Invested Interest Rate - Inflation Rate = Discount rate
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50 cents$1
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0102030405060708090
100
0 5 10 15 20 25 30 35 40
4%6%
Perc
ent
of O
rigi
nal
$$$
Perc
ent
of O
rigi
nal
$$$
4% Discount Rate4% Discount Rate6% Discount Rate6% Discount Rate
YearYear
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Material Cost Information – Large Quantities (also Small, Med. & All)
$49.00$123.00 Patching (SY)
$11.00$44.00Surface (SY)
$1.60$5.60Diamond Grinding (SY)
PCC
$0.60$1.40Grinding (SY)
$18.00$56.00Patching (Ton)
$15.00$30.00Patching (SY)
$6.00$36.00Wedge/Level (Ton)
$5.00$35.00Base (Ton)
$7.00$48.00Gap Graded (Ton)
$5.00$36.00Surface (Ton)
HMA
2.90$4.60Borrow (CY)
$1.20$5.60GAB (SY)
$4.30$9.80Excavation (CY)
Other
Standard DeviationUnit CostGeneric ItemItem Classification
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Average Service Lives for LCCA(historical data)
8.112.03rd
Rehabilitation
9.811.12nd
Rehabilitation
10.011.91st Rehabilitation
20.014.8Initial
Composite PavementRigid PavementFlexible
PavementCycle
Service Lives Standard Deviation for LCCA
1.94.53rd
Rehabilitation
3.04.42nd
Rehabilitation
2.84.71st
Rehabilitation
5.75.8Initial
Composite Pavement
Rigid Pavement
Flexible PavementCycle
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Future Rehabilitation Estimates
- 2” Grind- 2” HMA OL -3% HMA/PCC
patching
- 2” Grind- 3” HMA OL - 5% HMA patching
3rd Rehabilitation
- min. 4” HMA OL - 5% PCC patching
- 2” Grind- 3” HMA OL - 3% HMA patching
2nd Rehabilitation
- 5% patching-100 % clean/seal joints- Diamond Grind
- 2” Grind- 2” HMA OL - 1% HMA patching
1st Rehabilitation
Composite PavementRigid PavementFlexible PavementCycle
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Present Worth Analysis (ln/mi) for -- HMA 10 year (lccpa99.xls)
Interest6
Year Construction Item and/or Material Quantities Unit Cost/Unit Current Price Present Worth 0 9" hma base course (mainline) 7040 sy 18.00$ $126,720 $126,7200 3" hma intermediate course (mainline) 7040 sy 6.00$ $42,240 $42,2400 2" hma wearing surface (mainline) 7040 sy 4.15$ $29,216 $29,2160 9" hma base course (shoulder) 4106 sy 18.00$ $73,908 $73,9080 3" hma intermediate course (shoulder) 4106 sy 6.00$ $24,636 $24,6360 2" hma wearing surface (shoulder) 4106 sy 4.15$ $17,040 $17,0400 Maint. & Protection of Traffic @2.3% 1 ls $7,216 $7,216 $7,2160 Mobilization @5.5% 1 ls 17,257.00$ $17,257 $17,2575 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $2,608
10 Deep Patch 2% (mainline) 142 sy 81.00$ $11,502 $6,42310 Mill 2" (mainline) 7040 sy 1.60$ $11,264 $6,29010 2" hma overlay (mainline) 7040 sy 4.15$ $29,216 $16,31410 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $1,94910 Maint. & Protection of Traffic @2.3% 1 ls 1,276.00$ $1,276 $71310 Mobilization @5.5% 1 ls 3,051.00$ $3,051 $1,70415 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $1,45620 Deep Patch 2% (mainline) 141 sy 81.00$ $11,421 $3,56120 #60 scratch course 211 ton 34.00$ $7,174 $2,23720 2" hma (mainline) 7040 sy 4.15$ $29,216 $9,11020 Type 7 Paved Shoulders (2.25-inches) 4106 sy 5.85$ $24,020 $7,49020 Maint. & Protection of Traffic @2.3% 1 ls 1,654.00$ $1,654 $51620 Mobilization @5.5% 1 ls 3,955.00$ $3,955 $1,233
$0 $030 Same Scenario as Year 10 1 ls 59,799.00$ $59,799 $10,412
$0 $035 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $454
$0 $020 Total Annual Maintenance ($1825/yr) 40 yr 1,825.00$ $73,000 $22,762
$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0
Total Present Worth $433,462
78 %
8 %
6 %
2 %
5 %
10 Year Life
$ 433,462
Agency Costs
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Present Worth Analysis (ln/mi) for -- HMA 15 year (lcc15.xls)
Interest6
Year Construction Item and/or Material Quantities Unit Cost/Unit Current Price Present Worth 0 9" hma base course (mainline) 7040 sy 18.00$ $126,720 $126,7200 3" hma intermediate course (mainline) 7040 sy 6.00$ $42,240 $42,2400 2" hma wearing surface (mainline) 7040 sy 4.15$ $29,216 $29,2160 9" hma base course (shoulder) 4106 sy 18.00$ $73,908 $73,9080 3" hma intermediate course (shoulder) 4106 sy 6.00$ $24,636 $24,6360 2" hma wearing surface (shoulder) 4106 sy 4.15$ $17,040 $17,0400 Maint. & Protection of Traffic @2.3% 1 ls $7,216 $7,216 $7,2160 Mobilization @5.5% 1 ls 17,257.00$ $17,257 $17,2577 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $2,321
15 Deep Patch 2% (mainline) 142 sy 81.00$ $11,502 $4,79915 Mill 2" (mainline) 7040 sy 1.60$ $11,264 $4,70015 2" hma overlay (mainline) 7040 sy 4.15$ $29,216 $12,19115 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $1,45615 Maint. & Protection of Traffic @2.3% 1 ls 1,276.00$ $1,276 $53215 Mobilization @5.5% 1 ls 3,051.00$ $3,051 $1,27322 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $96930 Deep Patch 2% (mainline) 142 sy 81.00$ $11,502 $2,00330 #60 scratch course 211 ton 34.00$ $7,174 $1,24930 2" hma (mainline) 7040 sy 4.15$ $29,216 $5,08730 Type 7 Paved Shoulders (2.25-inches) 4106 sy 5.85$ $24,020 $4,18230 Maint. & Protection of Traffic @2.3% 1 ls 1,654.00$ $1,654 $28830 Mobilization @5.5% 1 ls 3,955.00$ $3,955 $689
$0 $037 Seal Coat Shoulders 4106 sy 0.85$ $3,490 $404
$0 $0
$0 $020 Total Annual Maintenance ($1825/yr) 40 yr 1,825.00$ $73,000 $22,762
$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0$0 $0
Total Present Worth $403,138
84 %
7 %
3 %
5 %
15 Year Life
$ 403,138
Agency Costs
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10 Year Life for HMA $ 433,462 15 Year Life for HMA $ 403,138
Difference of $ 30,324 per Lane/Mile
40 YEAR LIFE CYCLE
7.5 %
@ 6% discount rate
Agency Costs
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Life Cycle CostsDifference to 1st Overlay
8 $ 453,000 + 4.6 % 1st Overlay @ Year 10 433,000 - - -
12 421,000 - 2.8 % 15 403,138 - 7.5 %17 397,000 - 8.3 % 20 390,000 - 9.9 %
@ 6% discount rate
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Construction Duration Estimates
300 LF/day for forming or slipforming
Remove and Replace Concrete Curb and Gutter
4,000 - 6,000 CY/day1,600 - 2,400 SY/dayClass 1-A Excavation6,000 – 8,000 SY/day3,000 - 4,000 SY/dayGraded Aggregate Base Placement
5,000 – 6,000 LF/dayClean and Seal Joints5,600 – 7,000 SY/dayPCC Grinding
200 – 250 SY/dayPCC Patching4,000 - 5,000 SY/day3,000 - 4,000 SY/dayPCC Placement
800 – 1,000 tons/day200 – 250 tons/day
HMA Base Widening & HMA Wedge/LevelHMA Patching
8,000 – 10,000 SY/dayHMA Grinding1,500 - 2,500 tons/day1,400 – 1,500 tons/dayHMA Placement
New Construction OR few MOTRehab OR Under MOTConstruction Operation
*
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Original $433,462 $403,138
- Salvage Value $426,215 $395,891
- Salvage Value + User Delay* $459,607 $414,800
10 YEAR 15
11% difference* 35 second delay
* Speed change 65MPH to 45 MPHfor 1 mile (100k ADT @ 10% trucks for 5 days)
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Original $433,462 $403,138
- Salvage Value $426,215 $395,891
- Salvage Value + User Delay* $526,391 $452,618
10 YEAR 15
16% difference
* 95 second delay
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80%
When the difference is+ 10% Decision Made
Life Cycle Analysis40 year analysis @ 3% discount rate
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Life Cycle ActivitiesLife Cycle ActivitiesUsing the APA software we, the industry, evaluated effects of Maryland’s Pavement Selection Process.
a) Equivalent subgrade and aggregate base: HMA approximately 24% more economical
b) 4” increased subgrade and aggregate base for HMA:HMA approximately 16% more economical
HMA @ 80% reliability a) $ 3,372,488b) 3,752,651
PCC @ 80% reliability 4,351,378
Critical issue is that when the difference is <10%, thenother pavement selection factors kick in.
Maryland’s first project differential 16% in favor of HMA
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Like the presidential race pavement type selection is too close to call < 10%
Bush 46%Kerry 44%Nader 3%Undecided 7%Margin of Error +/- 4%
What if the difference had been < 10%
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Pavement Selection Flow ChartLCCA
DifferenceLess than
10%
Pavement Selection Team&
Matrix
UseInnovative
Contracting
Proceed with SelectedPavement Type
Proceed with Selected PavementAlternatives & Innovative
Contracting
Follow Pavement DivisionProcedures
Yes
YES
NO
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Pavement Selection Team
Matrix Inputs & Importance to Project
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Matrix In
puts May B
e Diffe
rent
Rural
Urban
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25%Design & Environment
*Reliability of Construction
*Material Sources6%20%Maintenance of Access12%40%Maintenance of Traffic6%20%Utilities & Future Maintenance6%20%Duration of Contract
30%Construction
*LCCA
16%35%User Delay Present Worth29%65%Agency Cost Present Worth
45%CostWeightWeightWeightFactorComponent
FinalComponentFactor
Matrix Scoring Criteria
EXAMPLE
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* non-scoring elements
*Future Planning
*Community Concerns
5%20%Environmental Impact
6%25%Adjacent Pavement & Structures
14%55%Traffic & Geometry
25%Design & Environment
Matrix Scoring Criteria
Total = cost 45% + construction 30% + Design & Environment 25% = 100%
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Pavement Selection Flow ChartLCCA
DifferenceLess than
10%
Pavement Selection Team&
Matrix
UseInnovative
Contracting
Proceed with SelectedPavement Type
Proceed with Selected PavementAlternatives & Innovative
Contracting
Follow Pavement DivisionProcedures
NO
YES
YES
NO
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Carlos RosenbergerAsphalt Institute
Equivalent Pavement SectionsLife Cycle Analysis
Analysis PeriodDiscount RatePerformance PeriodsMaterial PricesVariability of Performance & PricesRehabilitation StrategiesConstruction Duration
MatrixPrimary InputsSecondary Inputs
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• Primarily based on Economics
• Be Rational, Objective, Understandableand Defensible
• Be based on Historical Facts
• Provide the Best Value for the Taxpayersand Road Users
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Carlos RosenbergerAsphalt Institute