Construction Analysis for Pavement Rehabilitation Strategies

AASHTO Value Engineering Conference

Sep 2, 2009

Michael Samadian: Caltrans DRI

Dr. E.B. Lee: U. C. Berkeley

AASHTO-FHWA Technology Endorsement

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CA4PRS, Decision-support Tool for Highway Sustainability Projects

CA4PRS, DecisionCA4PRS, Decision--support Tool for support Tool for Highway Sustainability ProjectsHighway Sustainability Projects

• Highway Sustainability Projects– Over-due Design-life: M & R projects– Capacity Improvement : Roadway widening projects– Work-zone Impacts on Mobility and Safety– FHWA 2008 Regulation: WZ Assessment and TMP

• CA4PRS Software: Pooled-fund (5 DOTs)– AASHTO TIG Promotion: WZ Tools– FHWA Outreach: Market-ready Technology Product

• Group-License (Free) for all 50 State DOTs• Distribute to 20 states and training 1,200 engineers• Caltrans leadership: Standard and implementation stage

– International Road Federation (IRF) Award

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CA4PRS Modules: Alternatives ComparisonCA4PRS Modules: Alternatives ComparisonCA4PRS Modules: Alternatives Comparison

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Alternative Criteria and ImplementationAlternative Criteria and ImplementationAlternative Criteria and Implementation• Pavement Design Alternatives

– Pavement Type: PCC, HMA, RHMA, Pre-cast– Cross-section, Thickness, Mix, Base type

• Traffic Lane-closure Schemes – Construction window: Night-time, Day, Weekend, Continuous– Closure-hour Sensitivity and Closure-scale (Full vs Partial)

• Contractor’s Logistic Constraints– Site access and Constructability constraints

• Planning Stage: PSSR or PA&ED– Value Analysis: Alternative Comparison– Life-cycle cost analysis

• Design Stage: PS&E & TMP– Working-days (CPM); Construction-staging; Constructability – Lane-closure charts; Incentives (I/D); TMP; Outreach

• Construction Stage: Contractor’s work-plans

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I-15 Devore Concrete Reconstruction ProjectsII--15 Devore Concrete Reconstruction Projects15 Devore Concrete Reconstruction Projects

CA4PRSValidation• Two truck-lane PCC Pavement Reconstruction

– 3-4 lanes / direction, 120,000 ADT – 10 lane-mile (2.5 mile x 2 lanes x 2 dir) PCCP – 12” JPCP / 6” ACB, using 12-h mix RSC

• CA4PRS Pre-construction Analysis– Schedule – Traffic – Cost Comparison– Conventional (Nighttime) vs. Innovative (Extended) Closures– Post-construction analysis: $6M (cost) and $2M (delay) Saving

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I-15 Devore Daily Traffic Patterns- Approximately 120,000 ADT (10% trucks)- Weekdays Commuters + Weekend Leisure

II--15 Devore Daily Traffic Patterns15 Devore Daily Traffic Patterns-- Approximately 120,000 ADT (10% trucks)- Weekdays Commuters + Weekend Leisure

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1,000

2,000

3,000

4,000

5,000

6,000

1 3 5 7 9 11 13 15 17 19 21 23Time of day

Veh

icle

s pe

r ho

ur

SB (Mon-Thu) SB (Sun)NB (Mon-Thu) NB (Fri)

Expected CWZ capacity

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II--15 Devore Pre15 Devore Pre--construction Analysis construction Analysis CA4PRS ScheduleCA4PRS Schedule--TrafficTraffic--Cost ComparisonCost Comparison

TotalClosures

ClosureHours

Max.Delay(Min)

Delay (RUC)Cost ($M)

AgencyCost ($M)

TotalCost ($M)

One RoadbedContinuous (24/7) 2 400 80 5.0 25.0 30.0

72-Hour WeekdayNon-stop 8 576 50 8.0 26.0 34.0

55-Hour WeekendExtended 16 880 80 14.0 27.0 41.0

9-Hour NighttimeClosures 230 2,100 50 7.0 31.0 38.0

8-Hour NighttimeClosures 300 2,400 20 3.0 33.0 36.0

7-Hour NighttimeClosures 410 2,900 10 1.0 35.0 36.0

ConstructionScenario

ConstructionSchedule

CostWZ Traffic Delay

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CA4PRS Interaction with Traffic Database

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CA4PRS Interaction with Cost Bid Database

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CA4PRS Integration with Life-Cycle Cost Analysis

11http://www.dot.ca.gov/hq/research/roadway/ca4prs/index.htmhttp://www.dot.ca.gov/hq/research/roadway/ca4prs/index.htmhttp://www.dot.ca.gov/hq/research/roadway/ca4prs/index.htm

Web Info: Google CA4PRS Web Info: Google CA4PRS Web Info: Google CA4PRS

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More CA4PRS Information?More CA4PRS Information?More CA4PRS Information?• Contacts

– Dr. E.B. Lee: UC Berkeley-ITS• (510) 665-3637; eblee@berkeley.edu

– Keith M. Platte : AASHTO Materials and Product Evaluation• 202 624 7830; kplatte@aashto.org

– Michael Samadian: Caltrans Research• (916) 324-2048; Michael_M_Samadian@dot.ca.gov

– Dr. Nadarajah Sivaneswaran (Siva): FHWA Turner-Fairbank • (202) 493-3147; n.sivaneswaran@dot.gov

– Ken Jacoby: FHWA Office of Asset Management• 202-366-6503; Ken.Jacoby@dot.gov

• GOOGLE “CA4PRS”http://www.dot.ca.gov/hq/research/roadway/ca4prs/index.htm

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CA4PRS => LCCA Integration: I-15 HOT WideningCA4PRS => LCCA Integration: ICA4PRS => LCCA Integration: I--15 HOT15 HOT WideningWidening

Shoulder

Shoulder

New

Shoulder

GP lanes

New

Express (toll) lane

GP lanes

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I-15 HOT Pavement Type SelectionSchedule – Traffic – Cost AnalysisII--15 HOT Pavement Type Selection15 HOT Pavement Type SelectionSchedule Schedule –– Traffic Traffic –– Cost AnalysisCost Analysis

0.1' Milling / 0.1' OGFC206510a2nd OGFC

0.6' Mill /0.25' HMA/0.25' PBA-6a/0.1‘OGFC2055201st ACP

Rehabilitation

0.35' Mill / 0.25' PBA-6a / 0.1' OGFC2045102nd ACP CAPM 0.35' Mill / 0.25' PBA-6a / 0.1' OGFC2035101st ACP CAPM

0.1' Milling / 0.1' OGFC202510a1st OGFC

0.1' OGFC/0.85' HMA/0.75' AB/1.1' AS201520ACP Widening

20-yearStandard-Life ACP

CPR "A" (10% Slab, grinding, seal)2065103rd PCCP CAPM CPR "B" (5% Slab, grinding, seal)206052nd PCCP CAPM CPR "C" (2% Slab, grinding, seal)205551st PCCP CAPM

1.0' JPCP/0.5'ACB/0.7'AS201540PCCP Widening40-yearLong-lifePCCP

Pavement Cross-sectionConst-(year)

Life(year)

ConstructionActivity

LCCA Design

LCCA needs 30 Analysis: 10 Constructions x 3 Estimates (Duration-RUC-Cost) <= CA4PRS

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I-15 Widening Life-Cycle Cost ComparisonII--15 Widening Life15 Widening Life--Cycle Cost ComparisonCycle Cost Comparison

($37)($10)Difference (PCCP-ACP)$108 $61 60ACP Total

$7 $3 Annual Maintenance$4 $1 42 nights102nd OGFC

$24 $5 286 nights201st ACP Rehabilitation$15 $5 143 nights102nd ACP CAPM $15 $7 143 nights101st ACP CAPM

$4 $3 42 nights101st OGFC$38 $382.5 years20ACP HOT Widening

ACP(Alternative)

$71 $51 60PCCP Total$2 $1 Annual Maintenance

$11 $2 165 nights103rd PCCP CAPM $9 $2 105 nights52nd PCCP CAPM $3 $1 41 nights51st PCCP CAPM

$46 $462 years40PCCP HOT Widening

PCCP(Baseline)

Un-discountNPV DiscountedAGENCY COST ($ Millions)

DurationLifeConstructionType