8-217 Section 822. Shoulder and Centerline Pavement Corrugations
822.01 Description
This work consists of providing all labor, material, and equipment required to mill corrugations at the shoulder or centerline locations shown on the plans.
822.02 Materials
None specified.
822.03 Construction
A.Equipment . Use equipment that will continuously mill the required pattern and is able to provide a smoothness profile of up to ⅛ inch within the cut depression between peaks and valleys . The cutting head(s) must be independently suspended from the power unit to allow the cutting tool to self -align with the pavement slope. Equip the cutting tool with guides to provide consistent alignment of each cut in relation to the centerline or edge line. Demonstrate to the Engineer the ability to achieve the desired surface inside each depression without tearing or snagging the asphalt surface or spalling the concrete surface. Begin production work after the Engineer approves the demonstrated process.
B.Construction Allow 72 hours after placement of HMA before milling corrugations in HMA. Allow PCC pavements to reach opening to traffic strength prior to milling corrugations. Construct c orrugations in accordance with the MDOT Standard Plan R-112 series. Dispose of waste material as specified in section 205. If final pavement markings are waterborne paint, ensure that a first application of waterborne paint is applied at the location of the final markings prior to the installation of the corrugations . After the corrugations have been installed, apply a second application of waterborne paint. If final centerline pavement markings are spray thermoplastic, ensure that an applicat ion of Temporary Pavement Marking, Type NR (Paint) is applied at the location of the final markings prior to the installation of the corrugations . After the corrugations have been installed, apply the spray thermoplastic pavement markings. MDOT Standard Specifications for Construction Section 822 8-218 If the final pav ement markings are specified as a long- life durable marking, paint a temporary waterborne paint layout line (with no beads) exactly where the permanent pavement markings will be placed. Apply the long-life durable marking after the corrugations have been i nstalled. The centerline paint can be used as a straightness guide for the corrugation milling machine to follow but are not to be used for exact placement . Centerline corrugations are to be centered along the centerline as shown in the MDOT Standard Plan R-112 series . Pavement markings are to be offset from the construction joint as shown in pavement marking in the MDOT Standard Plan PAVE -905 series . Remove all grinding spoils or waste and debris from the roadway surface immediately . Prevent the grinding r esidue from being blown or tracked by traffic or blown by wind. Do not allow residue to flow across lanes open to traffic or into gutters or drainage structures. Clean the shoulder and pavement at the end of each day using an Engineer -approved method.
822.04 Measurement and Payment
Pay Item Pay Unit Freeway Shld Corrugations, Milled, HMA .................................................. Foot Freeway Shld Corrugations, Milled, Conc .................................................. Foot Non-Freeway Shld Corrugations, Milled, HMA .......................................... Foot Non-Freeway Shld Corrugations, Milled, Conc .......................................... Foot Centerline Corrugations, Milled, HMA ........................................................ Foot Centerline Corrugations, Milled, Conc ....................................................... Foot
A.Freeway Shld Corrugations, Milled, HMA; Freeway Shld Corrugations, Milled, Conc; Non -Freeway Shld Corrugations, Milled, HMA; Non-Freeway Shld Corrugations, Milled, Conc; Centerline Corrugations, Milled , HMA; and Centerline Corrugations, Milled , Conc includes all labor, material , and equipment necessary to complete the work as described, including containment, collection, and disposal of spoils . The completed work will be measured by the foot along the outside edge of pavement from the center of the first corrugation placed to the center of the last corrugation placed, excluding sections gapped for intersections, bridges, rail crossings , or other locations, as shown on the plans and as directed by the Engineer . No additional payment will be made for beadless waterborne layout lines . All other pavement marking payments will be paid for under the appropriate pavement marking pay items.
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 778–779 of 1,146.