Showing Tag: "rrfb" (Show all posts)

RRFBs are back!

Posted by Steve Fitzsimons on Wednesday, May 2, 2018, In : For Traffic Signal Designers 
Thanks to action of an RRFB vendor, the Rapid Rectangular Flashing Beacon is back.  According to Aaron Lockwood of Carmanah Technologies Corp, Carmanah recently bought out the company that held the patent on part of the RRFB features and released the patents.  FHWA has reinstated the Interim Approval status at the federal level.  Mr. Lockwood is under the impression California has already obtained the blanket approval status that it held before for these devices.   I am hoping to obtain confi...
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RRFBs Bite the Dust (for now)

Posted by Steve Fitzsimons on Friday, January 19, 2018, In : For Traffic Signal Designers 
Rectangular rapid flashing beacons (RRFBs) have gained a lot of popularity in the last few years since the FHWA and Caltrans granted what is called Interim Approval of the device.  Unfortulately, FHWA recently withdrew approval, and within the last month Caltrans followed suit.  It seems one vendor of the product obtained a patent for the central part of the technology, and FHWA does not endorse products that are patented.   

W-Trans has been following posts on the ITE discussion board and has...
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Steve Fitzsimons If you would like to ask a question about driving rules, traffic signals or street lights, send your questions to: SFitzsimons@W-Trans.com or call 650-314-8313. Steve Fitzsimons is a professional Civil Engineer and Traffic Engineer in California. He is a principal at W-Trans. Find out more about W-Trans at www.w-trans.com **** If you need a traffic signal design or review, W-Trans is available for hire. If you are an electrical contractor, W-Trans is available for hire to prepare timing plans or traffic control plans.

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