Changeable Message Sign Displays During Non-Incident, Non-Roadwork Periods (2008) / Chapter Skim
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Pages 44-48
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45 The primary purpose of this synthesis was to present the state of the practice of state departments of transportation (DOTs) and agencies operating toll roads that display messages on changeable message signs (CMSs)
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The types of messages that are displayed during nonincident/non-roadwork periods as an alternative to leaving the CMSs blank are travel time, congestion, speed, safety campaign, PSAs, and/or traffic law or ordinance messages. Fifty-one percent of the 45 TMCs that regularly or periodically display messages during non-incident/non-roadwork periods reported a very favorable (22%)
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47 Congestion, Speed, Public Service Announcement, Safety Campaign, and Traffic Law or Ordinance Messages General The types of messages other than travel time that the TMCs displayed during non-incident/non-roadwork periods rather than leaving the CMSs blank are congestion (35%) , speed (15%)
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lessons learned were with displaying safety campaign messages. The responses from the TMCs focused on the concept that the safety campaign messages (1)
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49 General Procedures should be developed to ensure that existing CMS message design and display manuals are available to TMCs. Blank Changeable Message Signs versus Display of Messages Objective data are needed to assist TMCs in their decision to either leave the CMSs blank or to display messages.
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