Is the retroreflective strip also required for use on the highway-rail grade crossing advance warning sign?
No, a retroreflective strip is not required on highway-rail grade crossing advance warning signs, such as the W10-1. However, Section 2A.21 indicates that, where engineering judgment indicates a need to draw attention to a warning sign during nighttime conditions, a retroreflective strip of yellow material may be used on the sign support.
Related Questions
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