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Old June 26th, 2010, 11:34 PM   #5801
dl3000
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Plus if someone drifts in their lane, the dots are easily heard. If they were all reflective, it would be quite bright.
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Old June 27th, 2010, 01:32 AM   #5802
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Quote:
Originally Posted by dl3000 View Post
Plus if someone drifts in their lane, the dots are easily heard. If they were all reflective, it would be quite bright.
Washington State does that, and man, it looks beautiful at night. Everything is reflectorized
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Old June 27th, 2010, 02:30 AM   #5803
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Botts Dots work well in mild-weather states. In Washington State where it snows, the raised pavement markings are dug up by snowplows. Even then, they don't work well in areas with heavy traffic volumes. However, they are very visible in the rain which is a plus.

Washington State has now shifted to "Profiled Pavement Markings". These are regular plastic markings, but with parts of them thicker to form a "rumble" strip. It combines the durability and reflectivity of plastic markings with the safety mechanism of Botts Dots. I believe this is widely used in the Netherlands and the UK. I wouldn't expect German Autobahns to use these at non-restricted sections.



Sometimes, both Botts Dots and Profiled Pavement Markings are used.


Last edited by HAWC1506; June 27th, 2010 at 02:36 AM.
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Old June 27th, 2010, 02:50 AM   #5804
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Quote:
Originally Posted by geogregor View Post
Some promised photos from my trip.
First few shots from I-94 somewhere between Fargo and Bismarck in North Dakota:




To be continued....
I love these photos. Speed limit 75 will work well with me on freeways.
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Old June 27th, 2010, 04:04 AM   #5805
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Originally Posted by FM 2258 View Post
I love these photos. Speed limit 75 will work well with me on freeways.
That's a great shot, and a good example of how the Interstate system was designed in the late 50's. Wide medians, and note the attention to keeping the median in great shape. (I understand many medians have been filled in due to population growth, but this is the original standard!)
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Old June 27th, 2010, 04:38 AM   #5806
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Quote:
Originally Posted by FM 2258 View Post
I love these photos. Speed limit 75 will work well with me on freeways.
I think 75 on such freeway is still to low. Of course most people drive around 10 miles extra which means 85mph but even that is not too fast for such straight, not heavily trafficked, and well maintained road.

A lot of traffic in Europe flays around 90mph on much more congested and curvy freeways.
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Old June 27th, 2010, 04:46 AM   #5807
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Love the wide medians: http://lh6.ggpht.com/_MwSilCWQeS4/TC...0/DSC03246.JPG
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Old June 27th, 2010, 05:59 AM   #5808
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Quote:
I think 75 on such freeway is still to low. Of course most people drive around 10 miles extra which means 85mph but even that is not too fast for such straight, not heavily trafficked, and well maintained road.

A lot of traffic in Europe flays around 90mph on much more congested and curvy freeways.
Right, but there are highways like that in Northeast and max speed here is 65.. we'd welcome 75 very much
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Old June 27th, 2010, 06:49 AM   #5809
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So in summary what is the reason for using Botts Dots? I thought it had to do with durability for they last much longer than the usual rubberized paint.
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Old June 27th, 2010, 11:20 AM   #5810
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I'm curious about those american medians, what's reason behind their shape that they are using pit shape instead of hill shape or just straight horizontal shape on the level with road? It would be more logical for me to use hill shape, because when you accidentaly go there you will easier go back and it's harder to get car on the roof than when you are going downhill, isn't? Or why not just use straight horizontal medians?
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Old June 27th, 2010, 11:22 AM   #5811
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Quote:
Originally Posted by JuanPaulo View Post
So in summary what is the reason for using Botts Dots? I thought it had to do with durability for they last much longer than the usual rubberized paint.
Botts Dots were created to provide the "vibration" when you drive over them. That was the primary purpose. They are less durable than plastic paint.

They are gradually being replaced with profiled pavement markings in many areas, especially those with high traffic volumes.
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Old June 27th, 2010, 11:26 AM   #5812
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Quote:
Originally Posted by Aan View Post
I'm curious about those american medians, what's reason behind their shape that they are using pit shape instead of hill shape or just straight horizontal shape on the level with road? It would be more logical for me to use hill shape, because when you accidentaly go there you will easier go back and it's harder to get car on the roof than when you are going downhill, isn't? Or why not just use straight horizontal medians?
My guess is for water drainage. Plus it appears that the pavement is always a little bit higher than the immediate surrounding terrain
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Old June 27th, 2010, 11:38 AM   #5813
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Yeah, so that if the snow melts, the freeway isn't immediately under water. I remember those floods in Cedar Rapids, Iowa and New Orleans, Louisiana, where the freeways were the only roads still passable.
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Old June 27th, 2010, 12:58 PM   #5814
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yeah, I figured that after studying some pages about median (after posting) and saw some photos with water that this can be one of the reasons (this can be solved as in Europe), but still think it's more dangerous for cars/drivers than uphill/straight median
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Old June 28th, 2010, 01:18 AM   #5815
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The Interstate Part of my trip today....

I-280 East in East Orange,NJ

image hosted on flickr


City of Newark - NJ's Largest and Second most Diverse City

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Exiting

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Later after the Newark Museum - NJ's Largest Museum.....

I-280 East in University Heights / Downtown

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City of Harrison - one of NJ's Fastest Urban Renewal cities

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A view of Downtown Newark

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Exiting I-280 to Hudson County route 508

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~Corey
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Old June 29th, 2010, 06:49 AM   #5816
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Historical photos of Wisconsin Interstates
courtesy of the Wisconsin Historical Society


The intersection of Interstate 90/ 94 with USH 12 between Baraboo and Lake Delton.


I-90 overpass in Rock County


Interstate Highway I-90 and USH 12/18 (the beltline) east of Madison.


Interstate highway I-94/ USH 41 in Kenosha County.


Interstate I-90 and State Highway 35 at La Crosse, looking towards Minnesota.
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Old June 29th, 2010, 10:23 AM   #5817
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Interesting! You can see the development, on that Madison pic, the suburb of McFarland wasn't there yet, as was the Kenosha Regional Airport.
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Old June 29th, 2010, 06:59 PM   #5818
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Quote:
Originally Posted by ChrisZwolle View Post
Interesting! You can see the development, on that Madison pic, the suburb of McFarland wasn't there yet, as was the Kenosha Regional Airport.
McFarland was there, but it was a very tiny, isolated village located off of that image to the right that was swamped up into the Madison metro area since. The City of Madison itself has been gaining about 20K in population in each USCensus since at least WWII and has historically been highly aggressive with annexation. Most of that interchange area is now in the City of Madison.

Also, only now is I-94 in Kenosha and Racine Counties being re-engineered to eliminate the last of those screwy frontage road interchanges (I-43 was never on that grade). It is being upgraded from six to eight through lanes as a part of that project - on a grade that was already 2+2 before WWII. http://www.plan94.org/ Before the interstates, it was US 41, which the highway is still marked as, in addition to I-94. It is the main highway between Chicagoland and Milwaukee.

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Old June 30th, 2010, 01:44 AM   #5819
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The Lake Delton exit has also scene alot of development over the years as well. Especially now with the new expressway/ freeway bypass of the existing USH 12 grade south to Baraboo, currently under construction. (starting at Fern-Dell road)

side note: WisDot has almost NOTHING about the bypass on there web site, except for a single PDF brochure from 2006. While one intersection in Polk County gets four different webpages full of design info, contacts, studies, and traffic info/ detours.
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Old June 30th, 2010, 11:07 AM   #5820
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Quote:
Originally Posted by brewerfan386 View Post
The Lake Delton exit has also scene alot of development over the years as well. Especially now with the new expressway/ freeway bypass of the existing USH 12 grade south to Baraboo, currently under construction. (starting at Fern-Dell road)

side note: WisDot has almost NOTHING about the bypass on there web site, except for a single PDF brochure from 2006. While one intersection in Polk County gets four different webpages full of design info, contacts, studies, and traffic info/ detours.
Also, I do not at all like how that new US 12 freeway is being connected to I-90/94 there (a direct feed into the existing interchange from the south). I would have connected it to the interstate with a trumpet intechange by the curve at the west end of that image, with the existing US 12 interchange being 'piggybacked' on it using collector/distributor lanes. This would keep the existing highway in place for local access to the fast-growing resort developments in that area while removing the through traffic from that area.



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