Alternate Bidding in Missouri Transportation Estimators Association Annual Conference November 2-4, 2005 – Daytona Beach, FL Interstate 44 … South-Central.

Alternate Bidding in Missouri

Transportation Estimators AssociationTransportation Estimators Association

Annual ConferenceAnnual Conference

November 2-4, 2005 – Daytona Beach, FL

Interstate 44 … South-Central Missouri

Pavement Design and Type Selection Process

TODAY’S PRESENTATION Background

Team Members

Goals of the Team

Risks Taken

Outcomes

Next Steps

Pavement Design and Type Selection Process

Background

Last formal review in 1998

Issues with previous methods (Pro/Con)

Industry concerns

Public told us: “We want smoother pavements.” “Get in; Get out; Stay out!”

Pavement Design and Type Selection Process

Background

Why now? Dwindling financial resources More emphasis on

maintenance instead ofnew construction

Establishment ofdepartment goals

Publication of RDTPavement Report (2002)

Pavement Design and Type Selection Process

Team Members

MoDOT + Industry

MoDOT FHWA ACPA MAPA Contractors

(2 asphalt, 2 concrete)

Pavement Design and Type Selection Process

Goals of the Team

Two desired outcomes …

Provide public stakeholders with:

The best pavement product that can be delivered w/in current financial projections.

A clear understanding of pavement design and type selection process.

Pavement Design and Type Selection Process

Maintain two strong industries.

Goals of the Team

ASPHALT CONCRETE

Pavement Design and Type Selection Process

Goals of the Team

NHSRemaining

arterials

Pavement Team Consideration

Policy Decision

9,000 miles of MoDOT’s system carry 86 percent of the traffic (NHS and remaining arterials).

Collectors

Collectors73%

(23,000 miles)

Remaining Arterials

14%

NHS 13%

Pavement Design and Type Selection Process

Risks Taken

Existing risk if no action taken. Efforts by industry to mandate legislatively

Inviting industry to the table. Could parochial biases be put aside? Could discussions remain focused on topic? Alternate bids

Would more competitive bids be realized?

Organizational risk. Avoid skepticism & resistance to change

Pavement Design and Type Selection Process

Outcomes

Life-CycleCost Adjustment

Worksheet

Pavement Design and Type Selection Process

Life-Cycle Cost Adjustment Worksheet

Job Number J2P0479BCounty MaconRoute 36Call 040618-201 This Documentation should be filed with all other Final Letting Date 06/18/04 Engineer's Estimate Documentation. Also include a

copy along with the pavement estimation worksheetTotal Area of Paving 254419.6 SY in the Alternate Pavements Notebook.Area of Traveled Way 147786.1 SY

Spreadsheets use OMB Real Interest Rates January 2003SP125 Weight Factor 1.97 Tons/CY 5-Year 10-Year 20-Year* 25-Year* 30-Year +

2.100% 2.800% 3.150% 3.325% 3.500%Estimated Unit Price for SP125 $40.47 /Ton *Straight Line Interpolation From Published RatesEstimated Unit Price for Cold Milling $1.67 /SYEstimated Unit Price for Diamond Grinding $1.81 /SYEstimated Unit Price for Pavement Repair** $100.00 /SY **Includes all related Pavement Repair Items

Total LCCA Adjustment Factor $964,764 USE $964,800

LCCA Worksheet

Pavement Design and Type Selection Process

LCCA Worksheet% or Unit 2003 Present

MoDOT AC Projection Thick. (in.) Year Quantity Unit Price Cost Worth

20 Year MaintenanceDiscount Rate: 3.150%

Mill Surface Lift Traveled Way 1 20 147,786 SY $1.67 $246,803 $132,729AC Resurfacing Traveled Way 1.75 20 14,153 TON $40.47 $572,755 $308,024Miscellaneous 20% 20 1 Price $163,911.47 $163,911 $88,150Mobilization 5% 20 1 Price $49,173.44 $49,173 $26,445Construction added costs 12.9% 20 1 Price $133,210.85 $133,211 $71,640

33 Year MaintenanceDiscount Rate: 3.500%

Mill Surface Lift - all 1 33 254,420 SY $1.67 $424,881 $136,532AC Resurfacing (100%) - all 1.75 33 24,364 TON $40.47 $986,020 $316,850Miscellaneous 20% 33 1 Price $282,180.06 $282,180 $90,677Mobilization 5% 33 1 Price $84,654.02 $84,654 $27,203Construction added costs 12.9% 33 1 Price $229,327.74 $229,328 $73,693

Years in analysis: Total Cost: $3,172,915 $1,271,94345

Discount Rate: 3.500%Equivalent Uniform Annual Cost: $56,542

Pavement Design and Type Selection Process

LCCA Worksheet

MoDOT PCC Projection 2003% or Unit Present

Thick. (in.) Year Quantity Unit Price Cost Worth

25 Year MaintenanceDiscount Rate: 3.325%Traveled Way Slab Replacements 1.5% 25 2,217 SY $100.00 $221,679 $97,856Diamond Grinding of Traveled Way 25 147,786 SY $1.81 $267,493 $118,080Miscellaneous 20% 25 1 Price $97,834.40 $97,834 $43,187Mobilization 5% 25 1 Price $29,350.32 $29,350 $12,956Construction added costs 12.9% 25 1 Price $79,510.02 $79,510 $35,098

Years in analysis: Total Cost: $695,867 $307,17845

Discount Rate: 3.500%Equivalent Uniform Annual Cost: $13,655

Pavement Design and Type Selection Process

Alt. Pavement Update for Jobs Thru June 2005 with LCCA Factor 24 Alternate Projects to Date ($320.7 mil)

21 Full Depth ($295.3 mil) 3 Rehabilitation ($25.4 mil)

Full Depth 12 Asphalt Awards ($170.4 mil) 9 Concrete Awards ($124.9 mil)

Rehabilitation 1 Asphalt Award ($2.6 mil) 2 Concrete Awards ($22.8 mil)

Pavement Design and Type Selection Process

Results – Difference in Low Bids

Low PC Bids vs. Low AC Bids LCCA Factor not Applied PC Total – $223,509,000 AC Total - $220,580,000 Difference - $2,929,000 (1.3%)

Low PC Bids vs. Low AC Bids LCCA Factor Applied PC Total – $223,509,000 AC Total - $231,411,000 Difference - $7,902,000 (3.5%)

LCCA Factor has Determined Low Bid 2 Times since October 2003.

Pavement Design and Type Selection Process

Results – Over 2 Lane Miles

Superpave $/Ton

$43.62

$49.13 $48.36

$36.78

$0.00

$10.00

$20.00

$30.00

$40.00

$50.00

$60.00

3-Year Average 1-Year Average Non-Alt Jobs (SinceOct. 03)

Alternate Jobs

Pavement Design and Type Selection Process

Results – Over 2 Lane Miles

Concrete $/CY

$103.28

$122.14$116.12

$96.77

$0.00

$20.00

$40.00

$60.00

$80.00

$100.00

$120.00

$140.00

3-Year Average 1-Year Average Non-Alt Jobs (SinceOct. 03)

Alternate Jobs

Pavement Design and Type Selection Process

Other Facts

All Alt jobs with no LCCA have Asphalt awards

AC price Average for alternate paving projects is $36.78/ton or 15.7% lower than the 3yr ac average of $43.62/ton.

Concrete CY equivalent price for alternate paving projects is $96.77/CY or 6.3% lower than the 3 yr pc avg. of $103.28

Pavement Design and Type Selection Process

Outcomes

Pavement Rehabilitation Strategies For existing Portland cement concrete (PCC),

both plain and HMA overlaid Unbonded JPCP overlays HMA overlays on rubblized PCC

Transition from existing pavement design model to new model (Mechanistic-Empirical).

Pavement Design and Type Selection Process

Outcomes

Clearly Written, Established Process Readable & Understandable Consistent & Efficient

Pavement Design and Type Selection Process

Next Steps

Phase two Implement new pavement design process.

Develop calibration model for Missouri roadway conditions.

Subsequent generation of M-E designs for pavement types selected by the MoDOT/Industry Pavement Team. Will result in variable pavement thicknesses dependent upon local conditions.

Pavement Design and Type Selection Process

Next Steps ISSUES TO BE RESOLVED

Some of the issues yet to be resolved: Finalize costs to be included in LCCA.

I.e., user costs, vehicle operation costs, etc.

Review results from initial alternate bid pavement projects.

Is staged construction a valid design consideration?

Are full-depth shoulders cost effective?

Pavement Design and Type Selection Process

Next Steps ISSUES TO BE RESOLVED

Some of the issues yet to be resolved: Should noise impact and friction become

pavement design considerations? Are recycled pavement savings tangible and

should they be included in LCCA?

Pavement Design and Type Selection Process

Closing

We are committed to: Provide the best value to our customers. Keep industry involved as we learn more.

Questions?

Full report available on line at:

www.modot.gov/newsandinfo/PavementTypeSelection.htm

Pavement Design and Type Selection Process

Outcomes

New Pavement Strategies Jointed Plain Concrete Pavement (JPCP), or Conventional Hot Mix Asphalt (HMA)

Polymer Modified Asphalt (PMA) – top 2 lifts on most heavily traveled NHS & principal arterial routes

Stone Matrix Asphalt (SMA) – top lift on interstates