4.22Variable message signs used at roadworks#

4.22.3Message screens#

Difference

Replace:

  1. (d)Where there are alternating screens the “on” time of each screen shall be 0.6 ± 0.1 s per word or number and the total time required to read the message on both screens shall be taken into account when determining message length and letter height.

with:

  1. (d)Where there are alternating screens the “on” time of each screen shall be (0.6 ± 0.1) s per word or number and the total time required to read the message on both screens shall be taken into account when determining message length and letter height.
Source: MUTCD Part 3 · page 45 Open PDF at this page Search this document