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You must obey the grid, even when there are surveying errors
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# ? Jan 9, 2017 19:11 |
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# ? May 17, 2024 02:14 |
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I heard the slight jank in the all the roads after they cross Pandora was from a surveying error as well. Also the narrow park between Pandora and uhh Pandora was also created out of this error.
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# ? Jan 9, 2017 19:16 |
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carry on then posted:You must obey the grid, even when there are surveying errors That looks like a correction line, not a surveying error.
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# ? Jan 9, 2017 19:35 |
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PittTheElder posted:That looks like a correction line, not a surveying error. Doesn't having a correction line inherently mean there was a surveying error you needed to fix?
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# ? Jan 9, 2017 19:37 |
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RaffyTaffy posted:You must obey the grid. That's a major produce growing area of Colorado. Those farmers are not going to let a diagonal road be built on that side of the river.
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# ? Jan 9, 2017 19:43 |
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Baronjutter posted:Also the narrow park between Pandora and uhh Pandora was also created out of this error. I hope they named it Harris Park after the surveyor!
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# ? Jan 9, 2017 21:23 |
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fishmech posted:Doesn't having a correction line inherently mean there was a surveying error you needed to fix? No, it means they had to correct for the shape of the Earth not matching their measurements.
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# ? Jan 9, 2017 21:50 |
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...and any humor in the post is now dead and buried.
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# ? Jan 9, 2017 21:51 |
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While I was studying, I checked out an American surveying textbook that the library had. A good quarter of the book was devoted to the intricacies of the PLSS including at least a full chapter on all the little cheats like that that were necessary to map a round world into a rectangular system.
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# ? Jan 10, 2017 02:44 |
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Baronjutter posted:I heard the slight jank in the all the roads after they cross Pandora was from a surveying error as well. I think it's just a consequence of the bizarre surveying that was originally done by the Hudson's Bay Company. If you look at this map from 1855 you can see some of the weird stuff that's still reflected in the way the streets are set out today. On the north side of the Gorge the lots are long with a thin frontage on the Gorge, and the streets still run that way. Then there's the realignment north of Bay where the streets are square to... something? Nothing south of downtown is square to anything. Then you have separate grids in Esquimalt and Oak Bay and it's a wonder that anybody can get anywhere in Victoria. By 1897 the city has a grown a bit, but those different grids are all still there.
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# ? Jan 10, 2017 05:14 |
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Wow so many Vicgoons. Also yeah, grids formed separately then randomly met and everyone refused to change their street names so you'll get streets changing their names every time they cross one of our tiny municipal borders. Or just pointless poo poo like Richmond Ave. turning into Richmond Rd at a random point because gently caress you it's a road now. Not that road, street, or avenue has any meaning in victoria, totally random.
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# ? Jan 10, 2017 05:37 |
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Over its 2 mile length, one of the streets near me has 5 seperate names. Only one of the name changes even matches up with a current or historic town/jurisdiction boundary. I've highlighted the path of the street with thin red lines, and placed thick red lines at the start and end of the street, as well as each place the street name changes.
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# ? Jan 10, 2017 05:58 |
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My favorite local grid is Bellingham, Washington. The city is an amalgamation of four different cities that each had their own grids that ran somewhat parallel to the bay. Neighborhoods built post-amalgamation follow a completely different grid, and streets change names every time they pass from one grid to the next. Downtown is full of one-way streets but most of the pairs don't reconnect cleanly when they leave downtown. Good luck with that.
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# ? Jan 10, 2017 06:35 |
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fishmech posted:Doesn't having a correction line inherently mean there was a surveying error you needed to fix? Maybe , but no, it's a natural consequence of imposing a square grid onto a basically spherical surface. The correction lines are planned and periodic. At least in the Dominion Land Survey anyway, I imagine the US system it was based on did the same thing.
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# ? Jan 10, 2017 07:04 |
I'm surprised that the distortion gets significant enough to matter over a distance of only a few miles.
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# ? Jan 10, 2017 22:26 |
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There's two major problems that cause it. The first is that all land has to be accounted for, there can't be any significant gaps or overlaps anywhere. The second is that all townships, sections, etc. throughout the system have to be the same area, whether they're in Phoenix or Athabasca. So you can't simply survey up a meridian because as you travel north your township boundary will eventually converge. So the more often you correct, the smaller your corrections have to be.
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# ? Jan 10, 2017 23:46 |
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PittTheElder posted:That looks like a correction line, not a surveying error. It is indeed a correction line. ("Baseline Road" kinda gives it away)
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# ? Jan 11, 2017 00:12 |
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Well that's actually the confusing part to me, in Canada the correction lines are between the baselines, never on them. Might be different in the states though.
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# ? Jan 11, 2017 01:20 |
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Drove by 7-8 separate accidents this morning because of icy roads. People are loving idiots.
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# ? Jan 11, 2017 14:33 |
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Happy Noodle Boy posted:Drove by 7-8 separate accidents this morning because of icy roads. In states where icy roads are a common problem do driver training programs include learning about how to handle them? Or do driving tests have a "icy road" section or something?
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# ? Jan 12, 2017 02:24 |
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Yes the local DMV in every state that expects winter weather has an enclosed refrigerated icy road to test new drivers on.
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# ? Jan 12, 2017 02:29 |
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cheese-cube posted:In states where icy roads are a common problem do driver training programs include learning about how to handle them? Or do driving tests have a "icy road" section or something? The main problem seems to be overconfidence because of having 4WD/AWD/an SUV/a pickup(none of which will magically save you if you don't know how to drive on snow and ice), like so:
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# ? Jan 12, 2017 02:31 |
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In Scandinavian countries yes, fairly intense instruction and testing including emergency maneuvers on icey conditions. In the us if you know a few traffic signs and can drive forward without hitting much you get to drive. It's not much better on Canada. Driving is an essential human right and making It expensive or hard to attain would cause a revolt
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# ? Jan 12, 2017 02:40 |
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Chemmy posted:Yes the local DMV in every state that expects winter weather has an enclosed refrigerated icy road to test new drivers on. I didn't mean literally you dingus which is why I used quotes.
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# ? Jan 12, 2017 02:44 |
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What they really have is a giant slip n slide covered in used motor oil and some old cars to practice skidding around and if you smash up their designated slippery car it's no big deal the government picks up the tab.
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# ? Jan 12, 2017 02:48 |
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Chemmy posted:What they really have is a giant slip n slide covered in used motor oil and some old cars to practice skidding around and if you smash up their designated slippery car it's no big deal the government picks up the tab.
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# ? Jan 12, 2017 02:59 |
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My cousin's slippery driving test was done in a warehouse full of banana peels.
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# ? Jan 12, 2017 03:05 |
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OK lesson learnt.
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# ? Jan 12, 2017 03:11 |
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Chemmy posted:My cousin's slippery driving test was done in a warehouse full of banana peels. What, no Koopa shells?
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# ? Jan 12, 2017 03:22 |
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Baronjutter posted:In Scandinavian countries yes, fairly intense instruction and testing including emergency maneuvers on icey conditions. I recall Finland actually uses a skidpad to train new drivers. No Koopa shells, but sprinklers and maybe that rack that lifts the car up so it has less contact with the road.
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# ? Jan 12, 2017 15:25 |
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https://www.youtube.com/watch?v=5aNtsWvNYKE Great video on traffic safety, reactive vs systematic design, and traffic engineering in general.
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# ? Jan 12, 2017 18:40 |
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That's a neat video but holy hell that narrator is almost inaudible half the time.
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# ? Jan 18, 2017 16:20 |
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Steelion posted:That's a neat video but holy hell that narrator is almost inaudible half the time. The narrator is hilariously bad.
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# ? Jan 18, 2017 19:03 |
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the FHWA finally gave the go-ahead to start the project to rebuild I-70 across east Denver: http://www.bizjournals.com/denver/news/2017/01/19/feds-sign-off-on-1-2b-overhaul-of-i-70-across.html
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# ? Jan 20, 2017 03:17 |
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NoVA is getting a diverging diamond at the I-66/US-15 interchange. It's unusual enough that there is a news article about it.
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# ? Jan 28, 2017 22:58 |
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Whiz Palace posted:I recall Finland actually uses a skidpad to train new drivers. No Koopa shells, but sprinklers and maybe that rack that lifts the car up so it has less contact with the road. They use the sprinklers in Denmark. It is fun as hell when you have to brake as hard as possible to learn what happens. https://www.youtube.com/watch?v=IWeumS6bMw8
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# ? Jan 29, 2017 10:24 |
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Is there a good effort post on causes and solutions of highway congestion?
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# ? Jan 30, 2017 04:39 |
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pokie posted:Is there a good effort post on causes Cars pokie posted:and solutions of highway congestion? Asphalt Give me enough money, I'll tell you how to build the asphalt
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# ? Jan 30, 2017 05:24 |
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pokie posted:Is there a good effort post on causes and solutions of highway congestion? The cause of congestion is that too many cars are trying to use the road at the same time. The solution is to have fewer cars use the road at the same time. The politically popular and thus oft executed strategy is to build more road. However, because induced demand is a thing, this will usually fail to achieve anything, and will essentially always fail in the long term. Just go read all of Cichlidae's posts. Here's some good ones: Cichlidae posted:Let me answer your first question really quickly, because the second one is awesome and deserves its own post. The capacity of a freeway depends on the traffic composition I talked about earlier, the grade (slope) of the road, and the geometry of the roadway. On our freeways in Connecticut, we can get 2500 pcplpm (passenger cars per lane per mile) in good conditions, and 1500-1800 when the road is under construction. Cichlidae posted:Alright, it's time to learn about Congestion!
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# ? Jan 30, 2017 06:33 |
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# ? May 17, 2024 02:14 |
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pokie posted:Is there a good effort post on causes and solutions of highway congestion? Land use patterns that force the use of cars to get around. Better land use, infrastructure that makes driving the least attractive option, and tons of transit. The absolute worst solution that doesn't work is building wider highways, but we keep doing it.
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# ? Jan 30, 2017 06:34 |