Permanent Signs Mounted on Median Barriers (2014) / Chapter Skim
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29 APPENDIX A NCHRP Synthesis Topic 44-14 Survey Questionnaire In order to increase capacity and improve safety, transportation agencies are increasing the use of rigid median barriers to separate opposing traffic lanes on divided highways. Due to limited space in the median, a variety of permanent highway signs are often mounted within or on top of rigid median barriers.
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30 Questionnaire Contact: ______________________________________________ Position/Title: _____________________________________________________ In case of questions and for NCHRP to send you a link to the final report, please provide: Tel: ______________________________________________________________ E-mail: ___________________________________________________________ Section 1: Types of Rigid Median Barriers 1. What types of rigid median barriers are currently in service within your agency's divided highway network?
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31 2. Approximately how many existing overhead sign supports mounted within or on top of rigid median barriers are installed throughout your agency's total divided highway network?
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32 ____________________________________________________________________________________________ Design Characteristic Comments ____________________________________________________________________________________________
LATERAL WIDENING OF THE BARRIER CROSSSECTION IN THE VICINITY OF THE SIGN SUPPORT: This treatment is typically used to move the support laterally farther from the traffic face of the barrier to remove it from or reduce the severity of its position within the Zone of Intrusion (ZOI)
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33
Other Information (Please describe)
None If any item other than "None" is checked above, the project team would like to review this information in order to compile and summarize common practices for the Synthesis Report.
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34 8. Does your agency have current or past standard plans, specifications, and/or design guidelines for construction of permanent small sign supports mounted on top of rigid median barriers?
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35 SUPPORT: This treatment is typically used to move the support laterally farther from the traffic face of the barrier to remove it from or reduce the severity of its position within the ZOI.
TRANSITIONING TO A DIFFERENT TYPE OF BARRIER IN THE VICINITY OF THE SIGN SUPPORT: For example, transitioning from safety-shape barrier to vertical wall at the support location and then back to safety-shape.
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36 11. Additional Information Sources: Does your agency have any of the following materials available related to existing small sign supports mounted on top of rigid median barriers?
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92+ pages; Perfect Bind with SPINE COPY = 14 pts Permanent Signs Mounted on Median Barriers NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM NCHRP SYNTHESIS 465 N CH R P SYN TH ESIS 465 Perm anent Signs M ounted on M edian Barriers NEED SPINE WIDTH Job No. XXXX Pantone 202 C TRANSPORTATION RESEARCH BOARD 500 F ifth S treet, N .W .
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