Art. 641.03 Shoulder Rumble Strips CONSTRUCTION REQUIREMENTS
641.03 General. The sight screen shall be as shown on the plans and
according to AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, and AASHTO Standard Specifications for Highway Bridges. Wooden fence construction shall be according to the applicable portions of Section 507. All fencing for any one installation shall be of the Wood Plank, Type P, or the Cedar Stockade, Type S. The two types shall not be mixed together. Cedar pickets shall be either split or round, be completely stripped of bark, and be straight and free of excessive taper or bowing, and when installed, shall butt tightly against one another. There shall be no gaps greater than 1/4 in. (6 mm) in width between adjacent pickets. Fence panels, consisting of horizontal rails and wood planks or cedar pickets, may be prefabricated or built in place. Additional nails, not shown on the plans, may be used to temporarily tack members in place during erection. Nailing shall be done in such a manner as to avoid splitting the lumber. Lumber which, in the opinion of the Engineer, is split excessively, will be rejected.
641.04 Backfill. The backfill for posts shall be CA 6, CA 10, or CA 12
aggregate according to Article 1004.01. Backfill shall be thoroughly compacted, meeting the approval of the Engineer.
641.05 Method of Measurement. Wooden fence will be measured for
payment in feet (meter), along the top of the fence from center to center of end posts.
641.06 Basis of Payment. This work will be paid for at the contract unit price
per foot (meters) for SIGHT SCREEN (WOODEN FENCE), of the type and height specified. SECTION 642. SHOULDER RUMBLE STRIPS
642.01 Description. This work shall consist of constructing rumble strips in
shoulders.
642.02 Equipment. The equipment shall be a self-propelled milling machine
with a rotary-type cutting head(s). The cutting head(s) shall be suspended from the machine such that it can align itself with the slope of the shoulder and any irregularities in the shoulder surface. The teeth of the cutting head(s) shall be arranged to provide a smooth cut, with no more than a 1/8 in. (3 mm) difference between peaks and valleys. Prior to commencement of the work, the Contractor shall demonstrate the ability of the equipment to achieve the desired results without damaging the shoulder. Impact Attenuators Art. 643.03 CONSTRUCTION REQUIREMENTS
642.03 General. The rumble strips shall be cut to the dimensions shown on
the plans. Guides shall be used to ensure consistent alignment, spacing, and depth. In portland cement concrete shoulders, rumble strips may be formed according to the details shown on the plans immediately after the application of the final finish. Rumble strips shall be omitted within the limits of structures, entrances, side roads, entrance ramps, and exit ramps. In portland cement concrete shoulders, rumble strips shall not be placed within 6 in. (150 mm) of transverse joints. Cuttings resulting from this operation shall be disposed of according to
Article 202 — 03 and the shoulders shall be swept clean.
642.04 Method of Measurement. This work will be measured for payment in
feet (meters) along the edge of pavement. Measurement will include both the cut and uncut (formed and unformed) sections of the shoulder rumble strips with exceptions for bridge decks, approach slabs, turn lanes, entrances, and other sections where shoulder rumble strips have been omitted.
642.05 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for SHOULDER RUMBLE STRIPS, 8 INCH (200 MM) or SHOULDER RUMBLE STRIPS, 16 INCH, (400 MM). SECTION 643. IMPACT ATTENUATORS
643.01 Description. This work shall consist of furnishing and installing impact
attenuators.
643.02 Materials. Materials shall be according to the impact attenuator
manufacturer’s specifications and the following. Item Article/Section
a.Fine Aggregate (Note 1) ..................................................................... 1003.01
b.Steel Posts, Structural Shapes, and Plates ........................................ 1006.04
c.Rail Elements, End Section Plates, and Splice Plates ........................ 1006.25
d.Bolts, Nuts, Washers and Hardware ................................................... 1006.25
e.Hollow Structural Tubing ................................................................. 1006.27(b)
f.Wood Posts and Wood Blockouts......................... 1007.01, 1007.02, 1007.06
g.Preservative Treatment ...................................................................... 1007.12 Note 1. Fine aggregate shall be FA 1 or FA 2, Class A quality. The sand shall be unbagged and shall have a maximum moisture content of five percent. CONSTRUCTION REQUIREMENTS
643.03 General. Impact attenuators shall meet the testing criteria contained
in either NCHRP Report 350 or MASH and shall be on the Department’s qualified
Referenced in this section
Sections that cite this one
SHOULDER RUMBLE STRIPS in other states
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 587–588 of 1,217. View official source ↗