Detector Loop Art. 886.04
885.03 Installation. The inductive loop detector shall be installed inside a
traffic signal controller cabinet. The detector shall be card rack type or shelf-mounted type. The detector shall be single-, two-, or four-channel.
885.04 Basis of Payment. This work will be paid for at the contract unit price
per each for INDUCTIVE LOOP DETECTOR or INDUCTIVE LOOP DETECTOR WITH SYSTEM OUTPUT, which price shall include the necessary connections and adjustments for proper operation. If the detector unit has more than one complete detection channel, each complete detection channel will be considered as a detector for payment. SECTION 886. DETECTOR LOOP
886.01 Description. This work shall consist of furnishing and installing a
detector loop in the pavement.
886.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Detector Loop and Sealer .................................................................. 1079.02 The detector loop and sealer shall be according to the manufacturer. CONSTRUCTION REQUIREMENTS
886.03 Testing. The detector loop shall be tested according to
Article 801 — 13(b)(2).
886.04 Installation. The detector loop location, shape, size, and the number
of turns shall be as shown on the plans or as recommended by the manufacturer of the related inductive loop detector. Multiple loops connected to the same detector channel shall be connected in series or as directed by the Engineer. The detector loop shall be installed in the pavement according to the details shown on the plans and the following requirements.
a.Type I detector loop shall consist of furnishing a detector loop wire enclosed in a flexible tubing and installing it in a sawed slot in the pavement. The sawed slot shall be clean, dry, and have a smooth bottom. Diagonal saw cuts or drilled holes shall be made at all corners to prevent sharp bends in the wire. The saw cuts at the corners shall be overlapped so they have full depth. The slot shall be cleaned by air pressure removing any debris and water. Each tube containing the loop wire shall be pushed into the saw cut with a wooden tool to prevent tube damage. Retainers shall be added to the sawed slot to prevent the loop wires from floating during the pouring of the loop sealant. These retainers shall be 1 in. (25 mm) pieces of the tubing bent in half. The loop wires not embedded in
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 758–758 of 1,217. View official source ↗