Laserfiche WebLink
2025 PAVEMENT MAINTENANCE OVERLAY SPECIAL PROVISIONS <br />PW# 3830 <br /> SP-80 March 26, 2025 <br /> <br /> 1 <br />8-20.3.GR8 2 <br />Construction Requirements 3 <br /> 4 <br />8-20.3(14).GR8 5 <br />Signal Systems 6 <br /> 7 <br />CNH 8-20.3(14)C INDUCTION LOOPS.DOCX 8 <br />8-20.3(14)C Induction Loop Vehicle Detectors 9 <br /> 10 <br />Section 8-20.3(14)C is supplemented with the following: 11 <br /> 12 <br />(******) 13 <br />Induction loops shall be constructed as detailed in City of Everett Drawing Nos. 14 <br />804, 805, 809, 810, and Section 8-20.3(14)C of the Standard Specifications with 15 <br />the following modifications: 16 <br /> 17 <br />1. The loop locations shall be marked on the pavement by the contractor 18 <br />and approved by the engineer prior to sawcutting. At no point shall any 19 <br />of the sawcuts pass closer than 2' to any utility cover. 20 <br />2. Loop detector sealant shall be as shown in City of Everett Standard 21 <br />Drawing 809, or as approved by the Engineer. 22 <br />3. Rope is not required. 23 <br />4. Loops shall not be installed in rainy weather or at temperatures below 24 <br />40o. 25 <br />5. Loops shall be placed in the sawcut in a clockwise direction. 26 <br />6. The loop sealant shall be applied in accordance with the manufacturer's 27 <br />recommendations. 28 <br />7. Detector loop wire shall use 14 AWG stranded copper conductors, and 29 <br />shall conform to IMSA Specification 51-7, with cross-linked polyethylene 30 <br />(XLPE) insulation encased in a polyethylene outer jacket (PE tube). 31 <br />8. The area around the conduit stub-out shall be patched with hot mix 32 <br />asphalt concrete if it is greater than 2" in width. 33 <br />9. The sawcuts shall be of uniform depth and any sharp edges, abrasions 34 <br />or ridges shall be removed prior to placing the wire. 35 <br />10. The sawcut depth shall be a minimum of 3½" and shall provide a 36 <br />minimum of 2" cover above the loop wires. 37 <br />11. The sawcut width shall be a minimum of 1/4" for the loop and 3/8" for the 38 <br />home run. 39 <br />12. The sawcut shall be cleaned out with a high pressure water stream and 40 <br />then dried with compressed air prior to placing the wire. 41 <br />13. All splices between the loop wire and the loop lead-in cable shall be 42 <br />soldered and utilize a splice kit in conformance with Standard Drawing 43 <br />809. 44 <br />14. When the roadway is to be overlaid as a part of the project, the loops 45 <br />shall be installed prior to the final overlay. 46 <br />15. Circular loops are standard installations. Where shown in the Plans, the 47 <br />contractor shall install quadrupole loops at stop lines due to stub-out 48 <br />diameter. At locations where quadrupole loops are shown and adequate 49 <br />stub-out diameter exists, round loops may be substituted for quadrupole 50 <br />loops. 51