SECTION 401
(a) Where the wearing course must be constructed in short sections (<3 sublots).
(b) Projects shorter than one half mile in length.
{c) Projects with a posted speed of 35 MPH or less.
(d) Projects with many driveways and/or cross roads with constant traffic.
(e) District resurfacing projects.
3. 17.3.5 Cross Slope.
3.17.3.5.1 Cross slope will be measured once per sublot (see Table 401-4) behind the paver after final rolling of the
wearing surface has taken place. Cross slope will only be evaluated when specific slopes and superelevations are shown on the
plans for the entire project. Only travel lanes will be evaluated for cross slope. Measurements will be taken only in areas of
normal tangent or full bank curves on even stations. Measurement shall take place utilizing one of the following methods, and
shall be agreed upon by both parties: “digital read” level and 10 to 12 foot straightedge: “bubble” level, ruler, and 10 to 12 foot
straightedge; transit; or electronic positioning equipment as approved by both Contractor and Department. If a straightedge is
employed, perpendicularity shall be assured with the use of a right angle prism or other method acceptable to both parties. Ifa
“bubble” or “digital read” level is employed, a second reading 180 degrees to the first shall be made and recorded, and the two
shall be averaged for the test result. Measurement data shall be shared between parties within 24 hours of measurement.
3.17.3.5.2 Once a cross slope percentage has been measured, a cross slope index (CSI) will be calculated. The target
cross slope shall be defined as the cross slope shown on the plans or as ordered to the nearest tenth of a percent. The CSI is the
actual deviation from the target divided by 0.40 percent, which is the tolerance used for pay factor calculation only. This will
allow statistical comparisons to be made among measurements based on varying specified cross slopes. The CSI will be
established for the sole purpose of calculating pay factors. The CSI shall be calculated under the following equation using the
specification limits in Table 401-10.
(M -SCS)
CSI = _
T
where: CSI = Cross Slope Index
SCS = Specified Cross Slope in percent
Me= Measured Cross Slope in percent
T= 0.40
Table 401-10 - Acceptable Quality Level Limits
TARGET LSL USL
Cross Slope Index 0.00 “1.00 11.00
3.17.3.5.3 If three or more consecutive cross slope sublot measurements on the pavement lift used to calculate the pay
factor deviate more than 0.5 (in percent) from the specified cross slope value at those locations, those sublots will be considered
to exceed the engineering limit of 0.5%, The Contractor shall submit a corrective action plan for approval by the Engineer for
cross slope sublots that exceed this limit.
3.17.3.5.4 After the approved corrective action plan is implemented, the sublots will be measured to ensure compliance,
but will not be re-measured for the purpose of re-calculating pay factor. Alternatively, the Contractor may submit a written
request for acceptance of the material at a negotiated price. The Engineer will determine whether the material may remain in
place at the negotiated price.
3.17.3.6 Rejection of Material.
3.17.3.6.1 An individual sublot. For any sublots with any test results exceeding the specified reject limits, the Engineer
will:
(a) Require complete removal and replacement with hot asphalt mix meeting the Contract requirements at no
additional expense to the department, or
(b) Require corrective action to the satisfaction of the Engineer at no additional expense to the Department.
3.17.3.6.2 A lot in progress. The Engineer will shut down paving operations whenever:
(a) The pay factor for any property drops below .90 and the Contractor is taking no corrective action, or
(b) Three consecutive tests show that less than 50 percent by weight of the particles retained on the No. 4
sieve have at least one fractured face.
2016 NHDOCT
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