Avoid using blank messages on dynamic message signs (DMS) including dashes for travel time applications as drivers may not understand these signs or assume they are broken.
Findings from focus groups that evaluate the usefulness of hybrid static-dynamic signs in Florida.
Made Public Date
09/26/2017

1075

Statewide
Florida
United States
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Identifier
2015-00721

Best Practices in the Use of Hybrid Static-Dynamic Signs

Background

This study used focus groups to determine the usefulness and preferences of different types of hybrid electronic signs for disseminating different types of information in Florida. Ten different applications were tested in four different categories: countdown, travel time, speed control, and other. Each focus group was composed of 150 participants.

Lessons Learned

Avoid using blank messages including dashes for travel time applications as drivers may not understand these signs or assume they are broken. For applications that provide comparative travel times, a majority of participants preferred a display that provided both travel times and toll amounts on one sign.

Beware that deploying hybrid static-dynamic signs for traveler information is useful to drivers, but may encourage speeding.

  • Countdown signs have potential to encourage speeding as drivers attempt to beat the time on the sign.
  • Participants are more likely to slow down when automated speed control messages display their would-be fine instead of their speed.
  • Participants indicated that with advisory speed progression applications it can sometimes be difficult to differentiate between the advisory speed sign and the posted speed limit sign.

Best Practices in the Use of Hybrid Static-Dynamic Signs

Best Practices in the Use of Hybrid Static-Dynamic Signs
Publication Sort Date
12/01/2012
Author
Gan, Albert ; Dibakar Saha; Kirolos Haleem; Priyanka Alluri; and Dennis McCarthy
Publisher
Lehman Center for Transportation Research, Florida International University

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Goal Areas

Focus Areas Taxonomy: