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Old November 29th, 2008, 04:05 AM   #3321
Tom 958
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I could be completely wrong about this, but...

I think the slotted signs are used to combat blinding glare from large reflective surfaces. The use of slotted versus standard signs seems random, but I think it has to do with how severe the problem is at a given location, which is apparently harder to predict than one would think. IOW, I think this type of signage was retrofitted in locations where glare was a big problem, and perhaps used preemptively where it may not have been strictly necessary. Better safe than sorry.

Alabama is the only place I remember seeing this type of sign, though the problem obviously exists literally everywhere the sun shines.

The signs are actually painted a dark, nonreflective green, though it might as well be black-- IOW, it's not just an illusion of photography. The risk of motorist confusion due to incorrect sign color is trivial compared to the risk of motorists being unable to see the road or the vehicles on it due to glare.
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Old November 29th, 2008, 04:06 AM   #3322
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Hmmm I have to say, I do like the colours. I prefer a lighter shade of blue, but it's better than the boring green. There's more contrast, and from the pictures, it looks easier to see.
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Old November 29th, 2008, 10:46 AM   #3323
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Does anyone have pictures of Washington highways that they would be willing to let me use for an article on Washington infrastructure?
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Old November 30th, 2008, 05:11 AM   #3324
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Big Dig easing traffic bottlenecks in city; but commuters still sitting in traffic longer
16 November 2008

BOSTON (AP) - The Big Dig has been easing Boston's once-notorious bottlenecks, but many commuters are still sitting in traffic longer.

A Boston Globe analysis of state highway data shows that while driving through Boston has improved from the days of the old elevated Central Artery, in many cases the traffic congestion has simply been pushed out of the city.

The worst traffic tie-up is along I-93 northbound during the evening commute.

In 1994, before the Big Dig tunnels were dug, it took an average 12 minutes at peak evening rush hour to go the 11 miles from the Zakim Bridge to Route 128 in Woburn.

Now is takes twice as long, about 25 minutes.

Traffic is also about three minutes slower during the evening commute on the Southeast Expressway.
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Old November 30th, 2008, 05:36 AM   #3325
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What would've happened if there hadn't been a Big Dig? Would it take an hour to make the commute?
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Old November 30th, 2008, 10:07 AM   #3326
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Quote:
Originally Posted by ChrisZwolle View Post
To compare; the Channel Tunnel between England and France had a 80% cost overrun, and is by far not profitable.
its not fair to expext "enterprise profit" from infrastructure projects...

- tolls distracts users so it is not fully exploited...

- a private enterprise has to pay tax which is expense not an income

- in case of a goverment (budget) financed project there are many income (what a private ent. couldt realise) and there are less expenses:

- budget has to pay no tax on tolls... (b/c there are no toll)
- budget has to pay no enterprise tax... (b/c it is not a forprofit enterprise it is a government investment...)
- for budget the extra taxes from the infrastructre generated economy and traffic increase are INCOME (and NOT income for a private enterprise)

of course this doesnt mean that EVERY huge megalomanic infrastructure project is profitable for tax payers, it only means that the budget has large vantage on private forprofit enterprises...

Last edited by H123Laci; November 30th, 2008 at 10:12 AM.
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Old November 30th, 2008, 10:35 AM   #3327
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It really did help. It's a big improvement IMO. When traffic increases a little, the number of jams can increase a lot. See what happened on some motorways in the Netherlands where the traffic just increased a little over the last few years, but jams that have never been there before is daily business now.
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Old November 30th, 2008, 01:09 PM   #3328
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Quote:
Originally Posted by hkskyline View Post
In 1994, before the Big Dig tunnels were dug, it took an average 12 minutes at peak evening rush hour to go the 11 miles from the Zakim Bridge to Route 128 in Woburn.

Now is takes twice as long, about 25 minutes.
12 minutes for 11 miles (18km) is a luxury. 25 minutes is still not bad, my previous commute took 30 minutes for 6 miles.
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Old November 30th, 2008, 01:43 PM   #3329
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I found a cool pic of the Leonard P. Zakim Bunker Hill Memorial Bridge on my computer, taken from Bunker Hill this summer by me

[IMG]http://i38.************/e6w2ug.jpg[/IMG]

-edit- I found another one:

[IMG]http://i38.************/2rdi2iv.jpg[/IMG]
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Old November 30th, 2008, 02:25 PM   #3330
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Quote:
Originally Posted by H123Laci View Post
its not fair to expext "enterprise profit" from infrastructure projects...

- tolls distracts users so it is not fully exploited...

- a private enterprise has to pay tax which is expense not an income

- in case of a goverment (budget) financed project there are many income (what a private ent. couldt realise) and there are less expenses:

- budget has to pay no tax on tolls... (b/c there are no toll)
- budget has to pay no enterprise tax... (b/c it is not a forprofit enterprise it is a government investment...)
- for budget the extra taxes from the infrastructre generated economy and traffic increase are INCOME (and NOT income for a private enterprise)

of course this doesnt mean that EVERY huge megalomanic infrastructure project is profitable for tax payers, it only means that the budget has large vantage on private forprofit enterprises...
We have the same issue in Denmark about the bridge between east Germany and east Denmark. Is it profitable or just a lot of money from the taxpayers which is going to desapear in the baltic sea. like 50 billion DKK (okay the half is from Germany)
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Old November 30th, 2008, 02:58 PM   #3331
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I-395 in Baltimore, Maryland.

The I-395 is a short expressway in the city of Baltimore, connecting downtown to the I-95.

Google Earth map:
[IMG]http://i36.************/15zle6r.jpg[/IMG]












Hazmat = Hazardous Materials



Picture credits to: AAroads
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Old November 30th, 2008, 03:26 PM   #3332
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I-83 Baltimore, Maryland

The I-83 enters Baltimore from the north, but is just a few miles short from reaching I-95, so it stops near downtown.





















Picture credit to: AAroads
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Old November 30th, 2008, 04:38 PM   #3333
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The northern end of I-83 a few miles from my house . It ends at Interstate 81.

image hosted on flickr


image hosted on flickr
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Old November 30th, 2008, 04:48 PM   #3334
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A good place for a one-arrow-per-lane diagrammatic. Georgia would have simply put a white downward arrow toward each lane and not said anything about the right lane splitting.

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Old November 30th, 2008, 09:25 PM   #3335
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Nvm, question has been answered already. I was asking about Hazmats, but i was blind not to notice the description...
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Old November 30th, 2008, 09:36 PM   #3336
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Quote:
Originally Posted by Tom 958 View Post
A good place for a one-arrow-per-lane diagrammatic. Georgia would have simply put a white downward arrow toward each lane and not said anything about the right lane splitting.

Yup. The traditional way of handling a similar situation:

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Old November 30th, 2008, 09:54 PM   #3337
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Wichita, Kansas
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Old November 30th, 2008, 10:42 PM   #3338
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Yup, I grew up there . . .
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Old November 30th, 2008, 11:48 PM   #3339
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I-83 is the only freeway in MD I been on where most drivers follow the "slower traffic kept right" rule.
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Old December 1st, 2008, 01:05 AM   #3340
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Quote:
Originally Posted by hkskyline View Post
The worst traffic tie-up is along I-93 northbound during the evening commute.

In 1994, before the Big Dig tunnels were dug, it took an average 12 minutes at peak evening rush hour to go the 11 miles from the Zakim Bridge to Route 128 in Woburn.

Now is takes twice as long, about 25 minutes.

Traffic is also about three minutes slower during the evening commute on the Southeast Expressway.
If they get rid of the bottle neck at one part, it is going to spread up to other areas. That just happens to be the effect since people are no longer stuck going through downtown, they are now stuck outside of downtown.
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