Calibration Signs Procedure for the Visual Nighttime Inspection Method
This module of the Retroreflectivity for Sign Inspectors Course is for any inspector using
Visual Nighttime Inspection with the Calibration Signs Procedure. It shows how to prepare for and properly conduct a nighttime inspection using this procedure and explains how the procedure ties to the minimum retroreflectivity levels in Table 2A-3 of the MUTCD. The module also covers resources needed for the calibration process and documentation of the inspection. R101 and S101 are prerequisites for this module.
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