Regional Boards > Northwest
Alaska's reflective poles
kphoger:
--- Quote from: triplemultiplex on October 11, 2022, 10:28:39 AM ---By cantilevering them from further beyond the edge of the road, they reduce the chances of the delineators getting knocked over by the snowplows.
--- End quote ---
Or errant vehicles.
kphoger:
--- Quote from: Quillz on October 07, 2022, 04:55:12 PM ---
--- Quote from: kphoger on October 07, 2022, 10:30:00 AM ---They are officially called an "Overhead Snow Pole" by the Alaska DOT, and their use is optional in "areas with poor winter visibility and extremely heavy snow accumulations". A variant was developed by Pexco specifically for the Dalton as well.
https://dot.alaska.gov/stwddes/dcstraffic/assets/pdf/atm/current/part3.pdf
https://dot.alaska.gov/nreg/daltondelineators/
--- End quote ---
Oh, interesting. I've only taken the Dalton Highway to the Arctic Circle, not gone north of there yet. Using Google Maps, I found some of those poles through the Brooks Range area. I guess that explains why they are grouped the way they are, those areas just accumulate a lot of snow for various reasons.
--- End quote ---
Example of the Pexco version on the Dalton:
https://goo.gl/maps/YDCLY8jDWZ7P2Mnz7
https://goo.gl/maps/TVGAZg9sDWWpXK33A
J N Winkler:
--- Quote from: Scott5114 on October 06, 2022, 10:03:25 PM ---I want to say Japan (Hokkaido specifically) has a similar style of snowplow marker, so that's probably it.
--- End quote ---
The markers that are used in Hokkaido appear in pairs and consist of arrows that point downward at the shoulder stripe on each side. They are retroreflectorized (and, in some cases, illuminated) so that the driver sees candy striping on the nearside and yellow on the offside. They are also quite high above the ground to maintain usual clearance for overhead signs (I don't know what Japanese standards call for specifically, but 17' is the norm in the US).
--- Quote from: kphoger on October 07, 2022, 10:30:00 AM ---They are officially called an "Overhead Snow Pole" by the Alaska DOT, and their use is optional in "areas with poor winter visibility and extremely heavy snow accumulations". A variant was developed by Pexco specifically for the Dalton as well.
https://dot.alaska.gov/stwddes/dcstraffic/assets/pdf/atm/current/part3.pdf
https://dot.alaska.gov/nreg/daltondelineators/
--- End quote ---
The Dalton used to have delineators that were arranged so that, in a blizzard, a driver could stay on the road by tacking toward alternating colors--moving toward white, then yellow, then white . . . This doesn't work if the same color is used on both sides of the road, as the MUTCD requires, so it looks like Alaska DOT is experimenting with different shapes in white.
Quillz:
--- Quote from: J N Winkler on October 13, 2022, 01:53:41 PM ---
--- Quote from: Scott5114 on October 06, 2022, 10:03:25 PM ---I want to say Japan (Hokkaido specifically) has a similar style of snowplow marker, so that's probably it.
--- End quote ---
The markers that are used in Hokkaido appear in pairs and consist of arrows that point downward at the shoulder stripe on each side. They are retroreflectorized (and, in some cases, illuminated) so that the driver sees candy striping on the nearside and yellow on the offside. They are also quite high above the ground to maintain usual clearance for overhead signs (I don't know what Japanese standards call for specifically, but 17' is the norm in the US).
--- Quote from: kphoger on October 07, 2022, 10:30:00 AM ---They are officially called an "Overhead Snow Pole" by the Alaska DOT, and their use is optional in "areas with poor winter visibility and extremely heavy snow accumulations". A variant was developed by Pexco specifically for the Dalton as well.
https://dot.alaska.gov/stwddes/dcstraffic/assets/pdf/atm/current/part3.pdf
https://dot.alaska.gov/nreg/daltondelineators/
--- End quote ---
The Dalton used to have delineators that were arranged so that, in a blizzard, a driver could stay on the road by tacking toward alternating colors--moving toward white, then yellow, then white . . . This doesn't work if the same color is used on both sides of the road, as the MUTCD requires, so it looks like Alaska DOT is experimenting with different shapes in white.
--- End quote ---
Oh, those Japanese ones are neat. I would have made the whole backside yellow, instead of just the tips, but either way that seems like a pretty neat idea.
ErmineNotyours:
And now to an area that doesn't need snow removal...
I was impressed by Maui putting reflectors right on roadside trees.
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