MUTCD 11th Edition (2023)
Section 2E.13 — lnterline and Edge Spacing
Manual on Uniform Traffic Control Devices, Section 2E.13. Standards, guidance, options and support statements, with figures and cross-references.
Section 2E.13 lnterline and Edge Spacing Guidance: 01 Interline spacing of upper-case letters should be approximately ¾ of the average of upper-case letter heights in adjacent lines of letters. 02 The spacings to the top and bottom borders should be equal to the average of the letter height of the adjacent line of letters. The lateral spacing to the vertical borders should be essentially the same as the height of the largest letter.
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