052104.27 — Temporary Portable Rumble Strips (TPRS)

104.27 Temporary Portable Rumble Strips (Tprs)

CATEGORY 100 PRELIMINARY SECTION 104.27 — TEMPORARY PORTABLE RUMBLE STRIPS (TPRS)

104.27.01 Description

Furnish, install, maintain, adjust, and remove temporary portable rumble strips (TPRS). Work shall consist of preparing the road surface, installing, maintaining, adjusting, and removing temporary rumble strips in construction work zones at the locations shown in the Contract Documents or as directed.

104.27.02 Materials

Temporary Portable Removable Rumble Strips QPL

104.27.02 01 TPRS shall consist of thermoset cast urethane, engineered polymers, or rubber materials. TPRS shall not curl or deform across the width of the strip, maintaining its rigidity. The face of the strips shall be a non-slip textured surface. Each strip shall be capable of being installed without adhesives or bolts.

104.27.02 02 TPRS shall consist of a single segment or be comprised of interlocking sections. The

color of the TPRS shall be white, orange, or black. Each TPRS segment shall be 3/4 in. to 1 in. thick, 10 ft to 12 ft long, and 8 in. to 15 in. wide. TPRS shall be deemed safe by the manufacturer for use by motorcycles and able to withstand tractor trailer traffic with minimal movement.

104.27.03 Construction

104.27.03 01 Installation, Monitoring, and Removal. Select the appropriate TPRS from the

QPL for the posted speed limit of the roadway. Provide a copy of the manufacturer’s installation guidelines to the Engineer. Install and remove according to the manufacturer’s recommendations and the Contract Documents. Verify placement with the Engineer prior to installation. Each segment shall be uniform in color throughout the work zone.

104.27.03 02 Installation. Do not use TPRS on loose gravel, bleeding asphalt, heavily rutted

pavements, milled or unpaved surfaces. Do not place TPRS through pedestrian crossings and railroad crossings. Do not use TPRS in rain, snow, or icy weather conditions. Do not extend TPRS onto the shoulder without the approval of the Engineer. Do not place TPRS on sharp horizontal or vertical curves; instead, install TPRS in advance of the curve so they are visible to approaching traffic. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS

104.27 Temporary Portable Rumble Strips (Tprs)

and restoring the pavement to normal conditions. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Clean the roadway to remove dust, sand, and other debris. Arrange the strips in an array consisting of three complete strips per lane spaced and configured according to the manufacturer’s recommendations and the Book of Standards. The length of each strip, whether comprised of one segment or interlocking segments, should be within 12 in. of the full lane width. Center TPRS in the lane.

104.27.03 03 Monitoring. Monitor, maintain alignment, and repair the TPRS if needed. Ensure

that the rumble strips are perpendicular to the lane and that the correct spacing between rumble strips is maintained at all times. Correct the positioning of the rumble strips if any strip moves by more than 1 ft in any direction during the work period. If any strip comes out of alignment, clean the strip on both sides, and reset the strip onto a clean roadway surface.

104.27.03 04 Removal. Remove TPRS from the roadway when lane restrictions are removed or

as directed. After removing the TPRS, clean and restore pavement to normal condition.

104.27.04 Measurement and Payment

The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work.

104.27.04 01 The initial installation of Temporary Portable Rumble Strips will be measured and

paid for at the Contract unit price per each array per unit day. A unit day will consist of any approved usage within a 24 hour calendar day period. When a temporary portable rumble strip array is used for part of a day, it will be measured and paid for as a unit day. An array consists of three complete temporary portable rumble strips spanning a single lane. Payment will be full compensation for cleaning the roadway surface, installing the rumble strip, and maintaining the strip through the duration of each day’s use, including cleaning and resetting of the strip if it comes out of alignment.

104.27.04 02 Remove and Relocate Temporary Portable Rumble Strips will be paid for at the

Contract unit price per each array. The payment includes removal of the temporary portable rumble strip array, relocating the array to a new location, cleaning the roadway surface, installing the rumble strips, and maintaining the strips through the duration of each day’s use, including cleaning and resetting the strip if it comes out of alignment.

104.27.04 03 Removal of the temporary portable rumble strips at the end of each workday and

final removal will be incidental to the item Temporary Portable Rumble Strips, including cleaning

104.28 Speed Display Trailer (Sdt)

2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.28 — SPEED DISPLAY TRAILER (SDT)

104.28.01 Description

Furnish, install and relocate a portable, self-contained, trailer mounted, dynamic speed display with static speed limit sign.

104.28.02 Materials

Speed Display Trailer QPL Each unit shall include the trailer, structural support system, sign panel assembly, lift mechanism, power supplies, sign mounted controller, non-invasive speed detection device, and ancillary equipment. All materials for the SDT shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities normally found along the edge of the traveled roadway. Construction, materials, and operation shall be in accordance with NFPA, ULI, and NEC. Sign messages shall be visible for a distance of 0.5 mile and legible for a distance of 900 ft from any point along the traveled approach roadway at all times.

104.28.02 01 Equipment. Trailer. In accordance with Maryland Motor Vehicle Law governing trailers. Structural Support. Refer to 104.19

Sign Panel. Sign panel dimensions shall not exceed 48 in. wide by 60 in. high. Display.