VDOT Lighting Update


Brent Archinal

My wife and I received letters on April 21 from VDOT about the Beltway and I-66 lighting projects.  These apparently are identical to letters others have received, as described on the NOVAC e-mail list.  More importantly, I've also received much new information on these projects that I'd like to share with all NOVAC members.  I've summarized this information in a message sent to the NOVAC and VA light pollution lists, and am also providing this copy for publication in the NOVAC newsletter.

On Saturday evening, April 15, I gave a tour of USNO to Jim Harrington and his family.  Those of you who attended the VDOT hearings on the lighting projects in January may recall that he is an engineer for Greiner Woodward Clyde (of Richmond, VA), the contractor for these projects.  It turns out that Jim is the chief engineer for this work. From my discussions with Jim, let me assure you all that he very much understands our concerns about reducing glare and protecting the night sky.  He is quite interested in amateur astronomy and knows how important it is to direct light down.  He claims that reducing glare is his number one concern on these projects.  He also explained that VDOT is now committed to the goal of keeping glare down on these projects and to using good lighting fixtures.  As I'll comment on further below, this attitude is very much in response to the comments and letters they received.

To cut to the chase though, they currently plan to use partial cut-off lighting, i.e. "Mongoose" fixtures from Holophane or similar (the inside joke in this name is that "mongoose" fixtures "eat" "cobra-head" fixtures).  This is the best fixture he could find that still did not require arms over the roadway, and the resulting maintenance problems such arms would cause (they feel you have to close a travel lane to do maintenance if you use full cut-off fixtures).  Information on this fixture is available from Holophane at http://www.holophane.com/Product/BROCHURE/HL-1855.HTM .  It isn't clear to me which version of this fixture they plan to use (there are many versions, from very good, to very poor), but it must be one of the partial cut-off ones.  I personally don't consider this to be the best solution and I told him so.  The advantages of using full cut-off lighting should supersede the added cost of their maintenance.  It also isn't clear why so many other states are able to use full cut-off lighting without having such problems while Virginia does.  Still, this is a few orders of magnitude better solution that what VDOT would probably have come with on its own, and (as John Nusbaum has pointed out on the e-mail list) we should congratulate ourselves for pushing them at least this far.

Some other miscellaneous points learned from Jim:

As to the letter from VDOT, I would say that it is encouraging, although not as much as my discussions with Jim were.  My comments on this letter in particular: I also have some news regarding another lighting project in northern Virginia, this time in Alexandria.  A source who asked to remain nameless (!) tells me that the city of Alexandria is planning to light the Potomac Yards area with "acorn" lighting.  My source is pushing them to use one of the modified versions of acorn lighting, that tries to direct some of the light down, but has not been able to convince them to use full cut-off lighting instead of the poor quality acorn lighting. However, this project is supposedly in an early enough stage that letters to the city may be able to influence them to use such lighting. So I just wanted to let folks in the Alexandria area know, in case they want to look into this further.  Now may be a good time to write some letters to the city government there.

Some final comments here from me on all of this.  First, regarding the VDOT projects, we have shown that we can make a tremendous difference. I'm aware of about 20 letters that went out from NOVAC members and related folks, and there are probably more than this.  That's about one third of the letters they received on these projects.  Clearly, VDOT has gotten the message and now considers glare and uplighting to be an important issue.Secondly, our work is not done.  VDOT should be questioned further about this project (as I have noted above) and future projects.  Finally, a key point here is that the highway projects were authorized by the state general assembly and governor, and no amount of comments after the fact was going to change that.  The only way to stop these projects or to get some serious consideration of whether they are needed is if we all contact our state representatives.  (This goes for you folks in MD and DC too!).

Regards, and clear dark glare-free skies to all,
Brent Archinal



 
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