Granite Construction Company 5/1/2018

1 1 CNH 8-20.3(14)C INDUCTION LOOPS.DOCX 111 2 8-20.3(14)C Induction Loop Vehicle Detectors 3 4 Section 8-20.3(14)C is supplemented with the following: 5 6 (******) 7 Induction loops shall be constructed as detailed in City of Everett Drawing Nos. 1 8 804, 805, 809, 810, and Section 8-20.3(14)C of the Standard Specifications 9 with the following modifications: 10 11 1. The loop locations shall be marked on the pavement by the contractor 12 and approved by the engineer prior to sawcutting. At no point shall any 13 of the sawcuts pass closer than 1' to any utility cover. I 14 2. Loop detector sealant shall be as shown in City of Everett Standard 15 Drawing 809, or as approved by the Engineer. 16 3. Rope is not required. I 17 4. Loops shall not be installed in rainy weather or at temperatures below 18 40°. 19 5. Loops shall be placed in the sawcut in a clockwise direction. I 20 6. The loop sealant shall be applied in accordance with the 21 manufacturer's recommendations. 22 7. Detector loop wire shall use 14 AWG stranded copper conductors, and 23 shall conform to IMSA Specification 51-7, with cross-linked 24 polyethylene (XLPE) insulation encased in a polyethylene outer jacket 25 (PE tube). 26 8. The area around the conduit stub-out shall be patched with hot mix I27 asphalt concrete if it is greater than 2" in width. 28 9. The sawcuts shall be of uniform depth and any sharp edges, abrasions 29 or ridges shall be removed prior to placing the wire. 30 10. The sawcut depth shall be a minimum of 31/2" and shall provide a 31 minimum of 2" cover above the loop wires. 32 11. The sawcut width shall be a minimum of 1/4" for the loop and 3/8" for I 33 the home run. 34 12. The sawcut shall be cleaned out with a high pressure water stream and 35 then dried with compressed air prior to placing the wire. I 36 13. All splices between the loop wire and the loop lead-in cable shall be 37 soldered and utilize a splice kit in conformance with Standard Plan 809 38 and 810. I 39 14. When the roadway is to be overlaid as a part of the project, the loops 40 shall be installed prior to the final overlay. 41 15. Circular loops are standard installations. The Contractor may propose 42 the use of square or rectangular loops for consideration by the 1 43 Engineer. 44 45 I 46 Existing Traffic Loops 47 The Contractor shall notify the Area Traffic Engineer through the Engineer 48 a minimum of five (5) working days in advance of pavement removal or I 49 grinding in areas with existing loops. 50 51 If the Engineer suspects that damage to any loop, not identified in the I 52 Plans as being replaced, may have resulted from Contractor's operations 53 or is not operating adequately, the Engineer may order the Contractor to HOT MIX ASPHALT OVERLAY-2018 PAGE 49 OF 57 March 6, 2018 I WORK ORDER#3667 SPECIAL PROVISIONS