MUTCD 11th Edition (2023)
Section 2L.05 — Message Length and Units of Information
Manual on Uniform Traffic Control Devices, Section 2L.05. Standards, guidance, options and support statements, with figures and cross-references.
Section 2L.05 Message Length and Units of Information Guidance: 01 The maximum length of a message should be dictated by the number of units of information contained in the message, in addition to the size of the CMS. A unit of information, which is a single answer to a single question that a driver can use to make a decision, should not be more than four words. Support: 02 In order to illustrate the concept of units of information, Table 2L-2 shows an example message that is comprised of four units of information. 03 The maximum allowable number of units of information in a CMS message is…
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