404EVALUATION OF ASPHALT PAVEMENT RIDE QUALITY AND PAYMENT OF INCENTIVE

PAYMENT OF INCENTIVE

404.1DESCRIPTION—This work evaluates an asphalt pavement surface profile and determines the ride-

quality incentive associated with the pavement surface profile.

bridge approach slabs and overlaid bridge decks. At least two of the following construction operations must be indicated in areas included in ride-quality lot measurements:

• Profile milling as specified in Section 492.

• Asphalt Base course.

• Asphalt Scratch course.

• Asphalt Leveling course.

• Asphalt Binder course.

• Asphalt Wearing course.

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;

• Pavement surfaces not constructed as a full-depth overlay, as indicated, such as the vertical transition areas at the limits of paving and at the approaches to bridges.

• Bridge decks unless overlaid.

• Ramps less than 1,500 feet in length.

• Tapered pavements.

• Shoulders, medians, and other pavement surfaces indicated.

• Pavement from 5 feet before and up to 5 feet after any appurtenances such as water boxes, manholes, railroad tracks, and inlets extending out into the pavement.

• Partial lots less than 100 feet

• Roadways with a posted speed limit of 40 miles per hour or lower.

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. The Representative will designate a partial lot at the ending limit of paving 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.

404.3CONSTRUCTION—

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 404.3(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 , 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, according to PTM No. 428, to the Representative.

surface 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 roadway 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 that requires grinding and where the irregularity is more than 3/16 inch when tested with a 12-foot straightedge.

tested with a 1 2-foot straightedge. 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 404.3(c).

more than 3 mm (1/8 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. Perform 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. Perform all corrective action before testing for pavement depth. Use one or more of the following methods:

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 of 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.

Unless otherwise approved, grind the entire lane width.

milling and replace at least the minimum layer depth of the specified surface course. Place more than the minimum layer depth if necessary to correct the pavement surface profile.

• The MRI of the lot exceeds the maximum acceptable MRI as specified in Table A of Section 404.4.

• Any individual bump (must grind) exists in the lot where the irregularity is more than 3/16 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 404.4, 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 lightweight 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 foot 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.

404.4MEASUREMENT AND PAYMENT—Dollar

The proposal will include an item and a predetermined amount of money for Evaluation o f Asphalt 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 of Asphalt Pavement Ride Quality and Payment of 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 according to Table A and 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 SCHEDULE A For Expressway Work Using Three Operations MRI inches/mile/lot Amount

≤ 35 ≤ 50 ≤ 60 ≤ 70 * > 70 $600 $300 $150 $0 Corrective action required SCHEDULE B For Expressway Work Using Two Operations and Non-Expressway Work Using Two or More Operations MRI inches/mile/lot Amount

≤ 45 ≤ 55 ≤ 70 ≤ 90 * > 90 $600 $300 $150 $0 Corrective action required * Maximum acceptable MRI