摘要: |
This report documents the results of a field evaluation of the InfraRed Inspection System (IRISystem). The objective of the evaluation was to determine the effectiveness of the IRSystem in enhancing the screening of commercial motor vehicles (CMVs) in real time at the roadside for problematic conditions, primarily malfunctioning brakes. Four states-Georgia, Kentucky, North Carolina, and Tennessee-participated in the evaluation for one year. CMVs were screened by IRISystem while in queue at scale sites and subsequently subjected to a CVSA Level 1 (L1) inspection. A limited number of vehicles with no apparent problematic conditions were also inspected as a control group for the study. Fifty-nine percent of the vehicles screened by the IRISystem as problematic were placed out of service (OOS) in the Level 1 inspection, mostly for brake violations (nearly 80%). The percentage of vehicles placed OOS after IRISystem screening (59%) exceeded the effectiveness criterion of 50% defined by the State of Kentucky in this program for the vehicle-by-vehicle analysis. The percentage of CMVs placed out of service with brake problems increased by a factor of 2.5 after using the IRISystem to screen vehicles for inspection. Additional considerations (training requirements, set up requirements, advantages, and limitations) are also respected herein. |