Evaluation of alternative dates for advance notification on portable changeable message signs in work zone's Academic Article uri icon


  • Results of a laptop-based human factors study of alternative formats of presenting notice of future roadwork messages on portable changeable message signs (PCMS) in highway work zones are documented. A total of 192 participants across Texas were shown a series of different two-phase messages for a fixed period of time and asked questions by test administrators to determine comprehension and recall of the information presented in each message. Participants were also asked to indicate their preferred format for presenting such information on a PCMS. On the basis of these studies, it is recommended that messages that require the display of calendar dates for future roadwork and other traffic control activities use a message format consisting of the three-character abbreviation of the month (e.g., APR for April) in conjunction with the date. When future work activities span several days in the same month, the month needs to be noted only once in the message (i.e., APR 2123) rather than repeating the month (i.e., APR 21-APR 23).

published proceedings


altmetric score

  • 3

author list (cited authors)

  • Ullman, G. L., Ullman, B. R., & Dudek, C. L.

citation count

  • 0

complete list of authors

  • Ullman, Gerald L||Ullman, Brooke R||Dudek, Conrad L

publication date

  • January 2007