Operational Evaluation of Do Not Block the Box Campaigns in Georgia

The overarching objective of this research is to provide the Georgia Department of Transportation (GDOT) and the Perimeter Community Improvement District (PCID) with an evaluation of the operational performance impacts of implementing a “Do Not Block the Box” (DBTB) campaign at selected signalized intersections. For the studied sites, the likelihood, or propensity, of a vehicle to block was measured both before and after the DBTB treatment installation. Several blocking behavior characteristics were seen throughout the analysis. First, the change in propensity with the installation of the DBTB treatment was inconsistent, witnessing both increasing and decreasing blocking rates. However, regardless of an increase or decrease in blocking rate, the aggregated observed propensities at the studied intersections were consistently high in both the before and after treatment conditions. The lowest observed aggregate propensity to block was 55%, with all other time periods above 60%, and with half of the observed periods having a propensity to block of 70%. In addition, there was significant variability in day-to-day blocking opportunities. While the current treatment as a standalone measure did not meaningfully impact blocking behavior, there is significant value in continuing to seek reductions in blocking behavior. Based on the study findings and field observations during the data collection, several recommendations are offered in this report.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 175p

Subject/Index Terms

Filing Info

  • Accession Number: 01675644
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-GA-18-1443, Report No. 2006Y62, RP 14-43
  • Contract Numbers: 0013114
  • Created Date: Jul 11 2018 2:33PM