Tag Archives: RRFB

Rapid Flashing Beacons related posts and articles from ELTEC

RRFB 6-Stage Progressive Night Dimming (IMSA Mar-April’12)

ELTEC’s RRFB Progressive Night Dimming

On January 9, 2012 the FHWA clarified and specified that Class 1 (yellow) lights are to be used in all RRFB (Rectangular Rapid Flashing Beacon) pedestrian crossings. The initial FHWA memo dated July 16, 2008 states that the RRFB light intensity “shall meet the minimum specification of Society of Automotive Engineers (SAE) standard J595…” The SAEJ595 standard has three light classifications: Class 1 at 200 cd/candela (a candela is the light output of one candle) used on authorized emergency vehicles (police cars, fire trucks, ambulances); Class 2 at 50 cd for maintenance vehicles; Class 3 at 25 cd used with service vehicles (indoor non-highway use: airport carts, forklifts, etc).

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Street Squad: Cedar Springs Crosswalks

Street Squad: Cedar Springs Crosswalks

James Rose
FOX 4 News

DALLAS – The City of Dallas has installed new warning lights at dangerous intersections along Cedar Springs Road in the Oaklawn neighborhood.

The rapidly-flashing yellow lights are strategically placed along the deadly stretch of roadway in the heart of a busy three-block entertainment district.

The strobes, which cost about $5,000 each, are among the first to be installed in the city and can be seen from blocks away in broad daylight.

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Not All RRFB Signals Are Created Equal (The Municipal Oct’12)

Not All RRFB Signals Are Created Equal

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Acr673269359556026357Rectangular rapid flashing beacons approved by the Federal Highway Administration for uncontrolled pedestrian crossings are a hot product within the traffic industry. In January of this year, the FHWA clarified that the LED indications in RRFBs must meet the SAE J595 Class 1 light intensity of 200 candela. A compliant RRFB indication can no longer “meet the minimum specifications of Society of Automotive Engineers standard J595” as originally stated in the July 16, 2008 memo. What does that really mean?

 

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Not All RRFB Signal’s Are Created Equal (IMSA Nov-Dec ’12)

November/December 2012

Not All RRFB Signal’s Are Created Equal

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Submitted by: Susan Marshall, Electro technics Corporation (ELTEC) and Mike Grenert, Whelen Engineering, contributing author.
RRFB_signal

Rectangular Rapid Flashing Bea-cons approved by the FHWA for uncontrolled pedestrian crossings are a ‘hot’ product within the traf-fic industry. In January of this year, the FHWA clarified that the LED indications in RRFB’s must meet the SAE J595 Class 1 light intensity of 200 candela (cd). A compliant RRFB indication can no longer “meet the minimum specifications of Society of Automotive Engineers (SAE) standard J595” as originally stated in the July 16, 2008 memo. What does that really mean? What other factors affect the quality of a RRFB signal/indication?

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ELTEC Uses FAA Standard for RRFB Dimming

May/June 2013

ELTEC Uses FAA Standard for RRFB Dimming

On September 27, 2012, the FHWA determined that daytime dimming of RRFB (Rectangular Rapid Flashing Beacon) indications is not allowed. “The effectiveness of RRFBs depends upon the light output from the RRFB signal indications meeting the SAE J595 requirements for peak luminous intensity (candelas) for Class 1 at all time during daylight hours.” Dimming at night is acceptable since the “RRFB signal indications are so bright that they cause excessive glare during nighttime conditions.”

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