SECTION 401
3.17.3.3.2 Disputed Thickness If a Contractor believes that a thickness result is invalid for whatever reason, the
Contractor shall notify the Engineer of this in writing within 24 hrs of being informed of the test result. After being informed
of the disputed result, the Engineer will select three random core locations in the disputed sublot and the Contractor shall cut the
cores at the selected locations in the presence of the Engineer who shall place them in secured containers for delivery and testing
at the Bureau of Materials and Research laboratory in Concord, NH and deliver them to the testing technician. If there are 10 or
more cores already tested to date, the pay factor for thickness in the lot will be calculated (without using the result of the disputed
core). If less than ten cores have been tested in the disputed fot, the three cores shall be held until ten cores have been tested or
the lot is complete, whichever comes first, at which time the pay factor will be calculated.
If the pay factor for the lot that contains the disputed result is 0.95 or greater, and the disputed test result is outside three
standard deviations from the mean value of the lot (calculated without using the result of the disputed thickness), the three cores
shall be measured and the average value of the three will be calculated.
If any of these three cores falls outside three standard deviations from the mean value for the lot (calculated without using
the result of the disputed core), the original thickness test value will stand. If the three cores fall within three standard deviations
of the mean value the average of the three measurements will be used as the thickness for the disputed sublot.
If the three cores are not used, the Contractor shall pay for the cost of testing.
3.17.3.4 Ride Smoothness.
3. 17.3.4.1 The Contractor shall furnish and have available a 10 ft., light weight metal straightedge with a rectangular
cross section of 2” x 4” at the paver at all times during paving operations. All courses shall be tested with the straightedge laid
parallel or perpendicular to the centerline and any variations from a true profile or cross slope exceeding 3/16” shall be
satisfactorily eliminated. The finished surface of the pavement shall be uniform in appearance, free from irregularities in contour
and shall present a smooth-riding surface.
3. 17.3.4.2 A GM type profilometer will be furnished by the Department for determination of pavement smoothness. This
device provides a Ride Number in both wheel paths that are averaged to produce a ride number for the surface tested. In the
event the Engineer feels that there is a significant difference in the wheel path profiles, a Ride Number evaluation of the individual
wheel paths will be made. The surface will be tested within 30 days after the wearing surface and pavement markings for each
discrete section of the project are complete. Immediately before testing, the Contractor will ensure the surface is entirely free
from any foreign matter that may affect the test results. No special considerations will be given to criteria such as degree of
curve and vertical geometry. Ride Number will be calculated to the nearest one hundredth for each 0.1 mile segment.
3. 17.3.4.3 Profilometer testing will include all mainline paving including bridges with lanes at least 11 feet wide. Testing
will begin 20 feet after the approach joint and end 20 feet before the departure joint. The pavement will not be evaluated over
bridge expansion joints, tapers, raised pavement markings, and sections less than 0.1 mile in lane length.
3. 17.3.4.4 All areas with bumps or high points exceeding 0.3” in 25 feet shall be corrected by removal of a minimum of
1” of the full lane width by the length required (a minimum of 100 feet) and replaced at the Contractor's expense.
3. 17.3.4.5 The Ride Number average of all sublots will be used to determine the final pay factor. The final pay factor
shall not exceed 1.05 and will be computed as follows:
For Level 1 Projects: | (Ride Number 4.20)
Pay Factor = RN (0.5)-1.1
For Level 2 Projects: (Ride Number 4.14)
Pay Factor = RN (0.5682) — 1.3523
3. 17.3.4.6 A final Ride Number shall be established after the wearing surface is completed and striped. Separate
completed sections of a project will be evaluated before the entire wearing surface is completed. Any sublot with a ride number
less than 3.7 shall be repaired or replaced.
3.17.3.4.6.1 Any sublot that has an individual wheel path ride number less than 3.7 shall be repaired or replaced. The
repair treatment shall be for the full width of the lane. Sublots that have been repaired or replaced shall be reevaluated for ride
smoothness and then averaged with all other sublots to determine the final project pay factor. Construction joints resulting from
repairs or replacement will be included.
3. 17.3.4.6.2 Level 1 will generally be all interstate and limited access highways with the following exception:
(a) A single course overlay that has a before ride number average of less than 4.00.
3. 17.3.4.6.3 Level 2 will generally be all other highways with the following exceptions:
2016 NHDOT
Go To=9> TOC Division 100 Division 200 Division 300 Division 400 Standard
Division 500 = Division 600 Division 700 Specifications
