×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

FHWA rescinds approval of Rectangular Rapid Flashing Beacons

FHWA rescinds approval of Rectangular Rapid Flashing Beacons

FHWA rescinds approval of Rectangular Rapid Flashing Beacons

(OP)
First, the official part:

Quote (https://mutcd.fhwa.dot.gov/mutcd_news.htm )

Termination of Interim Approval 11
On December 21, 2017, the FHWA terminated Interim Approval 11, which permitted the optional use of rectangular rapid flashing beacons. All highway agencies, including those agencies that previously received the FHWA's approval to use rectangular rapid flashing beacons under Interim Approval 11, are prohibited from installing any new rectangular rapid flashing beacons. However, any existing rectangular rapid flashing beacons that are already installed may remain in place until they reach the end of their useful service life.

Now the rumor and innuendo part.

I'm told that FHWA has a rule that only non-proprietary devices can be included in the MUTCD, and the inventor of RRFBs patented his invention and sued companies that were manufacturing them. It's too bad, because research showed these devices work.

RE: FHWA rescinds approval of Rectangular Rapid Flashing Beacons

I heard the same. One of our traffic consultants who holds a seat on the state MUTCD board confirmed the rumor regarding the inventor obtaining a patent. We are now reevaluating many ped crossings which were specs for RRFBs in the coming year.

I just wrapped a project installing several RRFBs and they are not as bright as I anticipated, and find the still acceptable perimeter signage lights to be much more visible.

RE: FHWA rescinds approval of Rectangular Rapid Flashing Beacons

That's too bad to hear. The DOT I worked with liked using these and recommended using them on some projects I was on. Is there any equivalent substitute for these?
HAWKs (High Intensity Activated Crosswalks) are also becoming increasingly used at the DOT I was with, but are used on a larger scale than RRFBs.

RE: FHWA rescinds approval of Rectangular Rapid Flashing Beacons

(OP)
timber04, we had people complain that the LEDs in the sign border weren't bright enough, and they complemented the RRFBs.

Milliontown, either round flashing beacons, or LEDs in the sign panel border.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close