• Rectangular Rapid Flashing Beacon (RRFB)

  
  
Description
  
  
  
ApprovalLetter.PDF
  
USDOT/FHWA
R42Approval Letter for Use of RRFB2010
ApprovalRRFB.pdf
  
NCDOT
R42Request for Approval to use RRFB2010
Interim.pdf
  
“Interim” Approval Letter for Use of RRFB
R42USDOT/FHWA2008
USDOT-FHWA.aspx
  
USDOT/FHWA
R42Why are RRFB not in the 2009 MUTCD?2008
IA-21 - Interim RRFB Letter.pdf
  
NCDOT Interim Approval Request for Optional Use
R42FHWA Interim Approval Request2018
IA-21 RRFB Approval Letter.pdf
  
NCDOT Approval - FHWA Assigned Number IA-21.43
R42FHWA Approval 2018
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