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Title: Motorists’ Understanding of Automated Flagger Assistance Devices in Work Zones
Accession Number: 01477064
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Automated flagger assistance devices (AFADs) are designed to be operated remotely by a flagger positioned outside the travel lanes and thus to reduce their exposure to vehicular traffic. There are two types of AFADs: one type uses a remote-controlled stop and slow sign to alternate the right-of-way and the other uses remote-controlled red and yellow lenses to alternate the right-of-way. A gate arm is required only with the latter. Although AFADs may have increased the safety of flaggers, there were concerns that motorists might have misunderstood AFADs and proceeded before it had been safe to do so. As part of a recent Texas Department of Transportation project, Texas A&M Transportation Institute researchers conducted surveys to assess motorists’ understanding of both types of AFADs. For the stop–slow AFAD, a newly designed "Wait on Stop–Go on Slow" symbol sign resulted in the highest percentage of participants who understood that they should stop and remain stopped until the AFAD indicated that it was safe to proceed. However, for all of the stop–slow AFAD treatments, a portion of the participants indicated that they would have stopped and then proceeded instead of waiting until the AFAD displayed the slow sign. Thus researchers recommend that a gate arm be required with stop–slow AFADs. For the red–yellow lens AFAD, participants understood the stop phase. However, there was evidence of a lack of understanding of the difference between the proceed and transition phases. Even so, the use of the gate arm appeared to inform motorists when to proceed and when to stop.
Monograph Title: Monograph Accession #: 01501139
Report/Paper Numbers: 13-4225
Language: English
Authors: Trout, Nada DFinley, Melisa DUllman, Brooke RPagination: pp 42–49
Publication Date: 2013
ISBN: 9780309286930
Media Type: Print
Features: Figures
(3)
; Photos; References
(8)
; Tables
(5)
TRT Terms: Uncontrolled Terms: Geographic Terms: Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management; I60: Maintenance; I73: Traffic Control
Files: PRP, TRIS, TRB, ATRI
Created Date: Feb 5 2013 12:49PM
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