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EzyLoops Installation

BEST PRACTICE NOTES

Comments: Due to pavement failure in the traffic lanes approaching this intersection a pavement “mill and re-sheet” was required to be carried out on this section of road. When the re-sheet work is complete, the detection loops will need to be reinstalled. Until recently this would involve the cutting of the surface of the road pavement and the installation of the loops by winding then into the saw-cuts.

Issue: The saw-cuts in the surface of the pavement will adversely affect the pavements structural integrity and therefore reduce the life of the pavement in the area of the loops. The reason for the reduced pavement life is that the saw-cuts in the pavement allow water to permeate into the lower layers of the pavement and accelerate the oxidization of the pavement.

On site pre-installation inspection.

  • Contact asphalt supervisor on site to determine best paving procedure.
  • Check that site plan is accurate and that packed EzyLoops are of adequate size.
  • Check pavement junction box (PJB) location, to determine lead wire access.
  • If area from loops to PJB is not milled and cannot be saw cut, do not proceed.
  • Open PJB and locate loop detector wires
  • Check number of screeds in PJB coincides with number of loops required in road.
  • Cut and clean entry to conduit leading to PJB.
  • Cut old lead wires and clean out conduit.
  • If access to PJB is blocked and cannot be cleared do not proceed with installation.

Installation of EzyLoops, in a milled road base-course.

  • Determine loop locations from site plan and generic installation plan, e.g. 1.5m from holding line and centered between lane lines.
  • Mark out lane lines and loop locations on road using spray marking paint.
  • Dry loop area if required using gas burner
  • Clean loop area using road broom and air-blower.
  • If the area in which the loops are to be installed is NEW concrete the area should be primed prior the installing the loops.
  • If possible, install loop furthest from PJB first, then work back to PJB.
  • Remove loop-roll from plastic pack and place on road at the holding line so that loop rolls out away from holding line.
  • Roll loops out, so that EzyLoops is unrolled under the cardboard roll with over-bandage base-bandage strips on top.
  • Remove over-bandage and base-bandage strips and place next to work area, remove cardboard and place in plastic tube.
  • Place EzyLoops in correct position using painted marks as a guide.
  • Important, using a permanent marker identify lane that the loop has been installed by placing a “R” for right lane a “C” for the center lane or a “L” for left lane, on the white tape on the end of the lead wire. Note, Once the lead wires have been feed through to the PJB these marks will be transferred to permanent cable markers supplied.
  • Remove backing paper from transverse section of EzyLoops nearest to the holding line and place on road in correct position. Work bandage on to road, first by hand then by treading it in.
  • Repeat step 10. for the remaining transverse sections of loop, working away from the holding line. Place waste backing paper in plastic tube.
  • Place the 3 lengths of over bandage over the 3 longitudinal sections of the EzyLoops using the same method as with the transverse sections, making sure that the base-bandage and wires are centered under the over bandage.
  • Place supplied adhesive base-bandage strips under lead-wires in strait line from EzyLoops to entry to PJB.
  • Place lead-wires in center of base-bandage and cover with supplied over-bandage, working towards entry to PJB.
  • Bring lead-wires from additional EzyLoops on to line of lead-wire base-bandage, making sure that lead wire groups don’t cross one another.
  • Important point. Once the loops have been installed, Loops and leads MUST be rolled in using a rubber wheeled roller or bobcat before the road is sprayed with tack-coat.
  • Feed lead-wires into conduit and through to PJB, making sure that each lead is marked with the appropriate lane ID.
  • Repair entry to conduit using recommended putty and polymer filler.
  • Lay excess lead-wire out and place permanent cable tags with lane ID on to lead near top of PJB.
  • Slide cable markers, i.e. S1, F1, S2, F2, down lead-wires to top PJB near cable tags.
  • Cut lead-wires off leaving approximately 1m of lead out of top of PJB.
  • Strip ends of lead-wires and test circuit using test light supplied.
  • Replace PJB lid and clean up.
  • Note, if good adhesion of EzyLoops to road base is not gained, it is recommend that some AC be placed on top of the loops before the final sheet is applied. Also observe the paver laying the mix as it passes over the loops to ensure that paver does not lift or slid on installed EzyLoops or lead-wire.