Evaluating iCone Speed Values against Dual-Loop Speed Values

This study evaluates data generated by a portable rapidly deployable, battery-powered traffic monitoring device called an iCone. iCones had previously been used by the California Department of Transportation (Caltrans) to monitor vehicle speeds in work zones, and the Berkeley Highway Lab (BHL), a 2.7 mile section of US Interstate 80, provided a unique opportunity to compare the speed values they generate against speed data from in-ground dual-loop stations. This allowed for careful comparison of the data characteristics including lane-by-lane breakdowns of speed observations and performance in a variety of traffic conditions over time. The iCones were deployed at five BHL dual-loop stations from mid-June to late August 2011. More than eight weeks of data were collected, with several weeks of matched data between the full set of five deployed iCones and the corresponding dual-loop stations. The data was analyzed, and detailed comparisons were made between the loop data and the iCone data.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures;

Subject/Index Terms

Filing Info

  • Accession Number: 01539297
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: CA12-2250
  • Contract Numbers: 65A0396
  • Created Date: Sep 5 2014 6:41PM