Can lettering on street name signs still be done in all upper case letters?
No, lettering for place names and destinations on all guide signs, including Street Name signs, shall be in mixed case lettering with the 1st letter in upper case followed by lower case lettering. This is because mixed case lettering has better recognition and legibility distances than all upper case lettering for place names and destinations. The minimum letter heights for Street Name signs given in Section 2D.45 refer to the height of the initial upper case letter.
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