High Intensity and Diamond Grade Meet DOT and MUTCD State and Federal Guidelines
MUTCD Information: When authorized by law or regulation, a supplemental EXEMPT (R15-3P) plaque with a white background may be used below the Crossbuck sign or Number of Tracks plaque, if present, at the grade crossing, and a supplemental EXEMPT (W10-1aP) plaque with a yellow background may be used below the Grade Crossing Advance Warning (W10 series) sign. Where neither the Crossbuck sign nor the advance warning signs exist for a particular highway-LRT grade crossing, an EXEMPT (R15-3P) plaque with a white background may be placed on its own post on the near right-hand side of the approach to the crossing.