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Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated) (2010) / Chapter Skim
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Displaying Messages with Dynamic Characteristics
Pages 45-46

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From page 45...
... Blank Time The amount of time that a CMS is left Insert a 300 ms blank screen Increased word and between Phases completely blank between message between message phases 1 and 2. number comprehension (3)
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From page 46...
... This improvement is possibly because a refractory period helps information processing between screens. Although this conclusion applies directly to portable message signs, it may be true for permanent message signs as well.
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Key Terms

  • blank time
  • changeable message
  • blank screen
  • reading times
  • reading time

  • increased reading
  • portable message
  • simulator settings
  • negatively affected
  • message sign

  • information units
  • total time
  • time available
  • empirical data
  • expert judgment

  • word excluding
  • information unit
  • excluding prepositions
  • times greatly
  • completely blank

  • sign operation
  • improves comprehensibility
  • sign improves
  • information processing
  • messaging handbook

  • message characteristics
  • comprehension levels
  • message cycled
  • optimizing comprehension
  • refractory period


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