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  • Rectangular Rapid Flashing Beacon (RRFB)

  
  
Description
  
  
  
ApprovalLetter.PDFApprovalLetter
NCDOT Approval letter for use of RRFB, IA-11-38 (Terminated)
R42FHWA2010
ApprovalRRFB.pdfApprovalRRFB
NCDOT request for approval to use RRFB
R42J.K. Lacy, P.E., State Traffic Engineer2010
Interim_IA-11.pdfInterim_IA-11
FHWA Interim Approval for use of RRFB, IA-11 (Terminated)
R42FHWA2008
FHWA FAQ.aspxFHWA FAQ
FAQ related to Interim Approval IA-21
R42FHWA2008
IA-21 - Interim RRFB Letter.pdfIA-21 - Interim RRFB Letter
NCDOT request for approval to use RRFB
R42J.K. Lacy, P.E., State Traffic Engineer2018
IA-21 RRFB Approval Letter.pdfIA-21 RRFB Approval Letter
NCDOT Approval letter for use of RRFB, IA-21.43
R42FHWA2018
Interim_IA-21.pdfInterim_IA-21
Interim Approval for use of RRFB, IA-21
R42FHWA2018
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