The lateral spacing between two-word messages in a single line of copy should be equal to the uppercase letter or capital letter in the given line of text (Figure 4‑12).

The lateral spacing between a word and an arrow (upward or downward) should be equal to 1.5 times the uppercase letter or capital letter in the given line of copy (Figure 4‑13).

The lateral spacing between a word and a Route sign should be equal to the largest letter height in the given line of copy. The largest letter height may come from the Route sign numeral or the text message (Figure 4‑14).

The lateral spacing between a word and a mileage numeral should be one times the uppercase letter height in a given line of copy (Figure 4‑15).

If two or more Route signs are in the same line of copy, the spacing between individual signs should be equal to the height of the largest numeral within the Route signs (Figure 4‑16).

Lateral spacing of arrows and text messages in exit only and left exit panels may differ and are standardized in the Traffic Engineering Standard Sheets.