2011 update on ride quality specifications frank palise advanced infrastructure design, inc. 1...
TRANSCRIPT
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2011 Update on Ride Quality Specifications
Frank Palise
Advanced Infrastructure Design, Inc.
1 Crossroads Drive, Hamilton, NJ 08691
Phone: 609.838.2216
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NJDOT IRI Based Ride Quality Specification
NJTA Profilograph Specification
FAA Profilograph Specification
Update on Selected Ride
Quality Specifications
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NJDOT IRI Based Ride Quality Specification
Profiler
Lasers
Video Camera
Walking ProfilerFull Size Profiler
SurPRO
SurPro uses a rolling inclinometer to measure longitudinal and transverse profiles
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Used for many years Measures PDL
(>1/8 inch in 10 feet) Simple, inexpensive Several drawbacks
1. Slow, labor intensive
2. Safety issues3. Reliability issues4. Sensitivity issues
ROLLING STRAIGHTEDGE (RSE)
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Rainhart
Profilograph
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California Profilograph
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Third Specification - 2011
PROPOSED REVISIONS TO
NJDOT’S PAVEMENT AND BRIDGE
RIDE QUALITY SPECIFICATIONS
Submitted by AID in August 2010
(Currently under review by the NJDOT)
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Proposed Specification - 2011 -
In the case of an overlay on bare PCC pavement, AID recommends establishing a maximum thickness of 4" for an overlay that would require using a composite pavement factor.
Also, if an existing overlay is to be resurfaced with or without milling, the composite pavement factor should not be applied if the final HMA layer is >4".
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Proposed Specification - 2011 -
For pavements designated to receive a thin lift overlay of less than <1½"
A percent (%) improvement specification should be considered. The following is recommended:
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Proposed Specification - 2011 -
Acceptance. The Department will determine acceptance and make payment adjustments based on the following:
Pay Adjustment. The pay equations in Table 401.03.03-7(A) and Table 401.03.03-7(B) express the pay adjustment in dollars per lot of 0.01 mile and 0.005 mile for pavements and bridges, respectively.
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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The number of lots for final pay adjustment has been reduced by (number to be inserted by designer). This includes:
Exempted bridge and approach/transition slabs
50′ before and after the approach and transition slabs, if not being overlaid with the pavement resurfacing operation or is being overlaid in a separate operation
Proposed Specification - 2011 -
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Proposed Specification - 2011 -
Locations where the traffic striping includes turn lanes that cause the through traffic lane to cross over a longitudinally paved joint will be treated in the following manner:
Rideability testing will follow the paving pass and will occur prior to application of permanent traffic striping.
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Proposed Specification - 2011 -
Impediments located in the lane and in shoulders within 5′ of the lane are excluded from pay adjustment, unless the impediments are reset as an item in the contract.
The exclusion area will include pavement within 10′ longitudinally before and after the impediment.
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Impediments include: utility covers,
manholes, catch basins, inlets, transverse
joints, intersections, railroad crossings
And any other features in the pavement
deemed to be a potential impediment to
achieving a smooth ride quality.
Proposed Specification - 2011 -
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Proposed Specification - 2011-
Projects of lengths less than one mile will be excluded
Pavement segments in projects that are long enough to contain ride quality requirements with less than 2500′ of continuous through travel lane construction will be excluded from the ride quality provisions.
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Proposed Specification - 2011 -
Do not test Ramps less than 1,000′ AID recommended not testing ramps
unless otherwise specified by the NJDOT on a project specific basis, if it is deemed that the length is sufficiently long to justify the inclusion of a ride quality requirement.
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Proposed Specification - 2011 -
If the preconstruction IRI is already in bonus territory
Then the target IRI will be adjusted such that the project’s IRI target range upper limit starts at the preconstruction IRI value.
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Proposed Specification - 2011 Bridge -
Test the longitudinal profile of the bridge deck surface for ride quality with a Class 1 Inertial Profiling System
According to AASHTO MP 11 and AASHTO PP 49.
If jobsite conditions preclude the use of the Class 1 Inertial Profiling System, the Department will use a walking profiler or lightweight profiler.
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The Department will use the measured IRI to compute the appropriate pay reduction as indicated in Table 507.03.02-2 below
Pay reduction lots consist of 0.005 mile lengths for each Wheelpath in each lane.
Proposed Specification - 2011 Bridge -
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Table 507.03.02-2 Reduction Per Lot of Bare Concrete Deck Slab Due to
Nonconformance with Ride Requirements for 0.005 Mile
IRI on Bare Concrete (in/mi.)
Reduction Per Lot, Percent
≤ 160
none
> 160 ≤ 190
> 190 ≤ 260
> 260
1.0
7.0
15.0
Proposed Specification - 2011 Bridge -
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The Department will determine conformance to the ride quality for concrete deck slabs in 0.005mile lots
Each lot being equal to the number of cubic yards of deck concrete placed per 0.005 miles in the designated traffic lanes
The RE will calculate such lot quantity using the specified nominal deck thickness
Proposed Specification
- 2011 Bridge -
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The Department will test the full extent of each wheel path of each lane in the longitudinal direction of travel
The average IRI value of both wheel paths reported for each 0.005-mile lot of the deck is the average of 3 runs.
Proposed Specification - 2011 Bridge -
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The proposed model is of the following form:
IRISPECIFIED = (IRIBASELINE) • (A1) • (A2) • (A3) • … • (Ak)
Where,
IRIBASELINE = standard level of IRI desirable for limited-access highway with pay-adjustment = $0.0
IRISPECIFIED = adjusted level of IRI to be specified by the Designer based on project-specific conditions
Ai = factors (variables) that are project specific (see below for further explanation)
k = Number of different factors in the equation
Proposed Specification
- 2011 -
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Proposed Specification - 2011 -
Factor Symbol
Speed Limit (MPH) AS
No. of Operations Ao
Existing Roughness (IRI) AE
Composite Pavement AC
Generalized (Ai) Factors
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Proposed Specification - 2011 -
Table 6. AS Factors
Note – Projects with less than 35 MPH speed limits, IRI Pay Adjustments will not apply.
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Number of Operations (AO)
Number of operations is defined as the number of improvement events allowed
For example, milling 2" followed by an overlay of 2" is considered to be 2 operations.
Or, milling 2" followed by placing 2" of base and 2" of overlay is considered to be 3 operations.
Proposed Specification
- 2011 -
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Existing Roughness (in terms of IRI) (AE)
This factor recognizes the difficulties in achieving a smooth pavement when the existing pavement is rough.
It is observed that the “number of operations” (AO) and the “existing roughness” (AE) are inter-connected factors and consideration of both factors contribute to a fair and equitable pay adjustment.
Proposed Specification
- 2011 -
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Proposed Specification - 2011 -
Table 7. (AO. AE) Factor
Note: Increase the above factor by 1.0 for bridge structures that will be overlaid in one continuous fashion.
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Composite Pavement (AC) If the overlay on bare PCC pavement is > 4",
exclude using a composite pavement factor
If an existing overlay is to be resurfaced with or without milling, the composite pavement factor should not be applied if the final HMA layer is >4"
Table 8. AC Factors
Proposed Specification - 2011 -
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Localized Factors
Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Proposed Specification - 2011 -
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Joe Beke - NJDOT609-530-2316
Frank Palise – AID609-838-2216
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The ENDThe ENDThank you!Thank you!