507EVALUATION OF CONCRETE PAVEMENT RIDE QUALITY AND PAYMENT OF INCENTIVE

PAYMENT OF INCENTIVE

507.1DESCRIPTION—This work evaluates a concrete pavement surface profile and determines the ride-

quality incentive associated with the pavement surface profile.

approach slabs and pavement relief joints. In the presence of the Inspector, measure the pavement surface profile according to PTM No. 428. Provide daily calibration results to the Representative before taking any measurements. Provide the raw unfiltered data files and a summary printout of the resultant International Roughness Index (IRI) data and Mean Roughness Index (MRI) values to the Representative within 24 hours of taking measurements. The Representative will determine payment for each ride-quality lot based on the MRI. Measure the pavement surface of the following excluded areas separate from the pavement surface profile of ride-quality lots. The Representative will not include measurements from excluded areas to determine lot incentive payment.

• Bridge decks

• Approach slabs and pavement relief joints placed under another contract.

• Ramps less than 1,500 feet in length

• Tapered pavements less than 12 feet wide

• Shoulders, medians, and other pavement surfaces indicated.

• Partial lots less than 100 feet

Type 1 (posted speed limit greater than 45 miles per hour) and Type 2 (posted speed limit less than or equal to 45 miles per hour). The Representative will designate lots starting at the beginning limit of paving and continuing to the ending limit of paving for each pavement lane and ramp that is 12 feet or wider. Do not include the length of excluded areas in the 528 feet. If the lot type changes, end the lot and begin a new lot. The Representative will designate a partial lot at the ending limit of paving, at a change in the lot type, and at an excluded area, when the lot length is less than 528 feet. The Representative will evaluate a partial lot as a percentage of a full lot.

507.3CONSTRUCTION—

verified by the Department according to PTM No. 428. In the presence of the Inspector, calibrate the distance sensor and check the profile system calibration before each day’s testing. Provide an operator that is Department certified according to PTM No. 428. The operator must carry a valid PennDOT certification card during pavement surface profiling.

objects and equipment from the surface and sweep the surface as necessary to remove debris. For projects identified for verification as specified in Section 507.3(f), identify, and delineate the profiling limits and excluded areas on the day of the verification. The Representative will verify the profiling limits are correct. Use traffic cones with reflective tape and reflective tape on the pavement at the beginning and end of each lane and excluded areas for triggering the start and stop locations of the profiler. In the presence of the Inspector,

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determine the pavement surface profile for each lot according to PTM No. 428. At the completion of testing, immediately submit the lot IRI data and MRI values, as defined in PTM No. 428, to the Representative.

of each excluded area in stages using a 12-foot straightedge. At each stage, hold the straightedge in contact with the surface and parallel to the road centerline and, in successive positions, test the pavement surface profile from one side of the excluded area to the other. Advance the test location to the next stage by moving the straightedge along the roadway centerline not more than 5 feet.

lot requires corrective action. Additionally, perform corrective action on any individual bump (must grind) where the irregularity is more than 1/4 inch when tested with a 12-foot straightedge.

with a 12-foot straightedge. Correct longitudinal joints not conforming to the requirements specified in Section 501.3(o)1. To improve the ride quality and at the Department’s expense, the Representative may require grinding of excluded areas that conform to the acceptable straightedge surface tolerances specified in Section 507.3(c).

inch when measured on the transverse profile. Correct a sufficient length of pavement to correct the pavement surface profile without producing additional high or low points. Retest the lots and excluded areas after completing corrective action. Perfor m additional measurements of the pavement surface profile, as necessary, for the Representative to determine which lots do not require additional corrective action. Correct surfaces to provide a uniform texture and positive cross slope so the pavement drains.

before grinding, reapply to ground area. Use one or more of the following methods:

2.a. Carbide Grinding. Use carbide grinding for correcting areas 15 feet in length or less. Use grinders of the walk-behind type that have cutting heads of carbide tipped shackles, stars, or blades and have a locking depth control to produce a uniform pavement surface texture. Provide a pavement surface texture consisting of parallel grooves between 3/32 inch and 1/4 inch wide with a “land area” between grooves 1/16 inch and 3/16 inch. Operate the grinder by making multiple passes if necessary, with a maximum depth of any single pass of 1/8 inch. Grind longitudinally or transversely across the pavement surface.

2.b. Diamond Grinding. As specified in Section 514.3 and modified as follows:

Unless otherwise approved, grind the entire lane width.

2.c. Removal and Replacement. Remove and replace a minimum of 10 feet of pavement between transverse joints of reinforced cement concrete pavements or an entire panel of plain cement concrete pavement. Where replacement extends to an existing transverse joint, replace the joint in kind as directed. Construct transverse joints at other locations resulting from removal of defective pavement using the methods for joining pavements shown on the Standard Drawings.

• The MRI of the lot exceeds the maximum acceptable MRI as specified in Table A of Section 507.4.

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• Any individual bump (must grind) exists in the lot where the irregularity is more than 1/4 inch when tested with a 12-foot straightedge.

• The surface adjacent to another ride-quality lot contains a ridge or valley of more than 1/8 inch.

• The specifications for pavement construction require removal and replacement of pavement within the ride-quality lot.

Unless the Department and Contractor agree to leave a defective lot in place as specified in Section 507.4, remove and replace defective areas and retest the ride-quality lot.

testing at a minimum of one day and on at least 10% of the project’s lane miles being evaluated using the Department’s inertial light weight profiler concurrent with smoothness acceptance testing. The Department may require smoothness verification testing for any smoothness acceptance testing. Coordinate with the Representative at least 14 days in advance to arrange for Department profiler testing and to schedule a virtual meeting with the Department’s Roadway Inventory and Testing Unit (RITU) to verify the smoothness verification testing procedures. Ensure the Department’s smoothness verification testing occurs concurrently with smoothness acceptance testing. The smoothness acceptance test results will be compared to the Department’s smoothness verification test results. The smoothness acceptance test results will be used for incentive payment when the following tolerances are met:

• The verification MRI does not exceed the acceptance MRI by more than 6.1 inches/mile on at least 90 percent of the 528 foott lots for each lane.

• The average verification MRI does not exceed the average acceptance MRI by more than 6.1 inches/mile for all lots tested in each lane.

• The difference in the length for all lots tested in each lane is less than 0.2 percent.

If the tolerances above are not met during smoothness verification testing, the Department will immediately review the testing procedures, equipment, and personnel used in the smoothness acceptance testing to determine if the test results are acceptable. When the Contractor’s smoothness acceptance test results are not considered acceptable, the Department’s smoothness verification test results will be used for incentive payment, and the Contractor’s profiler certification will be suspended and must be r ecertified according to PTM No. 428. Contact the RITU within 10 business days to schedule the profiler for recertification. Recertify the profiler before use on all Department projects.

507.4MEASUREMENT AND PAYMENT—Dollar

The proposal will include an item and a predetermined amount of money for Evaluation o f Concrete Pavement Ride Quality and Payment of Incentive. The contract item will have a unit of measure of DOLLAR, a unit price of$1.00, and a quantity equal to the predetermined amount. Due to the incentive or bonus status of the payment being made, the provisions of Section 110.02(d) are not applicable to this item. Measured and paid for, under the Evaluation o f Concrete Pavement Ride Quality a nd Payment o f Incentive item as follows:

• If the lot is not defective, Table A and the MRI for each lot will be used to determine the incentive payment for ride quality.

• The incentive payment for a lot subjected to corrective action will be determined using Table A and

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the MRI for the lot after the Contractor completes corrective action.

• The incentive payment for a partial lot will be determined as a percentage of a full lot.

• After corrective action, the Contractor may leave a defective lot in place if the District Executive provides written approval, and the Contractor accepts a $4,000 downward adjustment (rebate) of the amount paid for the lot.

• Costs associated with evaluating pavement ride quality will not be paid for separately.

TABLE A Payment Schedule for Ride Quality Incentive Type 1 Lots MRI inches/mile/lot Amount ≤ 35 ≤ 50 ≤ 60 ≤ 70* > 70 $1,500 $1,000 $500 $0 Corrective Action Required * Maximum acceptable MRI

Type 2 Lots MRI inches/mile/lot Amount ≤ 45 ≤ 55 ≤ 70 ≤ 90* > 90 $1,500 $1,000 $500 $0 Corrective Action Required * Maximum acceptable MRI