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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