632— Milled-In Rumble Strips

632.1 Description

1 Install milled- in rumble strips (MIRS) according to the Contract documents and the Manual on Uniform Traffic Control Devices (MUTCD).

632.2 Materials

1 Not applicable.

632.3 Construction

632.3.1 Interstate Routes and other Control -of-Access Facilities

with Paved Shoulders 1 Where specified, install MIRS in the mainline paved shoulder only. Do not place MIRS on ramp shoulders. 2 Use a rotary type cutting head for MIRS. Use a head with a maximum outside diameter of 24 in. and a minimum width of 16 in. Equip the cutting head with the cutting tips arranged in a pattern that provides a relatively smooth cut. Ensure that the cutting head(s) is mounted on an independent suspension from that of the power unit to allow the tool to self -align with the slope of the shoulder and/or any irregularities in the shoulder surface. Equip the cutting tool with guides to provide a consistent alignment for each cut relative to the roadway and to provide uniformity and consistency throughout the project. 3 Construct MIRS with finished dimensions as shown on Standard Drawing 632-105-01 and installed according to Standard Drawing 632- 105-02.

632.3.2 Non-Interstate Routes – Application of Rumble Stripes

1 Place MIRS for rumble stripe application along the edge lines and centerlines (if specified) of 2- lane roadways. For rumble stripe applications on 4-lane roads with a divided median, place MIRS along both inside shoulders (yellow edge line) and outside shoulders (white edge line). Ensure that all MIRS dimensions conform to Standard Drawing 632-2 05-01. 2 Use equipment that meet s Subsection 632.3.1 having a rotary type cutting head capable of producing a variable width of 4 in. to 12 in. for edge line MIRS and 12 in. to 16 in. for centerline MIRS. 3 Terminate installation of the MIRS before intersections as illustrated in Standard Drawing 632-2 05-01. Do not install MIRS on or across concrete bridge decks or approach slabs.