This report looks at the effectiveness of microloops as replacements for the inductive loops that are used as advance detection sensors at actuated signalized intersections. It also evaluated whether different loop detector models from several manufacturers can operate satisfactorily and consistently when attached to the microloop, and also determined the performance accuracy of loop detectors attached to a one-probe microloop or to a two-probe microloop. Research results support the hypothesis that microloops can function as a reliable replacement for inductive loops in advance detection applications. To achieve optimum results, the microloops must be used with Canoga C800 series vehicle detectors with version 1.2 firmware as part of a matched component system. Different brands of detector amplifiers do not perform as satisfactorily with the M701 microloop. Only the detectors that incorporate algorithms specifically developed for use with microloops demonstrated a performance that approaches the performance of inductive loops. These detectors also can be used in Presence Mode, thus allowing the traffic engineer to use the microloop in a broad range of applications. The strong attributes of microloop-based traffic sensors include shorter installation time, less pavement invasion, and improved life-cycle costs compared to traditional saw cut inductive loops, while providing consistent and accurate performance under all environmental and road conditions.


  • English

Media Info

  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: 110 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00769456
  • Record Type: Publication
  • Report/Paper Numbers: MN/RC-1999-15A,, Final Report
  • Created Date: Sep 15 1999 12:00AM