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Old March 21st, 2015, 07:16 PM   #2841
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Quote:
Originally Posted by Xusein View Post
Using untested technology for such a project (this is the widest tunneling machine ever built) wasn't a great idea. The tunneling for the light rail has been much more successful because it was more conventional. But there's too much stuff done to scrap the whole thing now. It's Seattle's Big Dig.
I think that you are wrong on this one. The size of the the tunnel is a new idea, but there is nothing untested about the process itself. It is a pure negligence of city engineers who just forgot their metal piping in the ground instead of removing it. The machine was not designed to cut through hardened steel.

My dad used to deal with TBMs - and he says that unless it was a machine built for tunneling through really hard rock, like granite, it is not designed for steel.

So nothing out of the ordinary with the technology itself, other than, if I can be so bold to call it the right name, a purely American f*ck up.
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Old March 21st, 2015, 07:17 PM   #2842
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Large projects like this include some kind of risk reserve to cover unforeseen expenditures. It's likely that this repair and delay consumes all that reserved money (and more).
I'd say there is an insurance for all this equipment and unforeseen circumstances. I guess these guys are about to write a big fat check to the city...
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Old March 21st, 2015, 08:16 PM   #2843
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Sign at Kansas City International Airport


Welcome To Missouri by formulanone, on Flickr
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Old March 21st, 2015, 11:04 PM   #2844
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The 826-836 interchange in Miami. This imagery is from December 2014.



Note how much wider the 836 gets when approaching the interchange.
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Old March 23rd, 2015, 10:36 PM   #2845
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Elaborate traffic signal gantry in Lenexa, Kansas (a suburb of Kansas City). It's located at Renner Boulevard and 87th Street Parkway (just off I-435).


87th and Renner Road by KDOTHQ, on Flickr

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Old March 23rd, 2015, 10:38 PM   #2846
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they had to close middle lane because any truck will take down the lights now
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Old March 23rd, 2015, 10:46 PM   #2847
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what could be the Reason for putting the signal on the other end of this quite large intersection?
it would be much easier to see if they were closer to the stop line. here they could flip the whole signal setup (left to right).
Interesting to me are the signs posted in the middle ("left on green arrow only") which you can only read when it is already too late. quite strange that this has to be posted
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Old March 23rd, 2015, 10:56 PM   #2848
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What?

No, no. I... I...

What?

Just What?
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Old March 23rd, 2015, 11:26 PM   #2849
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Quote:
Originally Posted by [atomic] View Post
what could be the Reason for putting the signal on the other end of this quite large intersection?
it would be much easier to see if they were closer to the stop line. here they could flip the whole signal setup (left to right).
Interesting to me are the signs posted in the middle ("left on green arrow only") which you can only read when it is already too late. quite strange that this has to be posted
Typically in North America the lights are on the other side of the intersection, I prefer it, it's easy to see when the light turns green when you are stopped. But I never really had a problem in Europe...
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Old March 23rd, 2015, 11:29 PM   #2850
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Dutch traffic signals are so close to the stopping line you have to reach forward to see them sometimes. Apparently it is safer (stop line further from the intersection, more clearance time) but it is also less comfortable. If I recall correctly Denmark places them both before and after the intersection.

The 'Right lane MUST turn right' sign is a bit over the top, the arrow on the pavement already indicates it is a right turn only (otherwise there would've been a through arrow in it as well).
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Old March 24th, 2015, 07:08 AM   #2851
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Queensboro Bridge


Midtown Manhattan Skyline & Queensboro Bridge viewed from LIC
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Old March 26th, 2015, 07:05 PM   #2852
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All US paved roads

An interesting map, featuring all paved roads, an no other feature, of the Lower 48 states.



Click here for a much larger version
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Old March 28th, 2015, 12:51 PM   #2853
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US 89, Arizona

US 89 south of Page repaired and open to traffic

School buses first to use newly rebuilt roadway after $25 million repair is completed following 2013 landslide

March 27, 2015

At approximately 4:15 p.m. today, US 89 south of Page was reopened to traffic for the first time following a Feb. 20, 2013, landslide that caused catastrophic damage to the roadway, requiring a 23-mile closure between the junction of State Route 98 in Page and US 89A near Bitter Springs.

In order to reopen the US 89 roadway today, the Arizona Department of Transportation completed an extensive $25 million repair, which included removing approximately one million cubic yards of rock material to realign a 1,500-foot section of roadway and construct a downslope rock buttress at the base of the Echo Cliffs to stabilize the area.
Full press release: http://azdot.gov/media/News/news-rel...pen-to-traffic

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Old March 29th, 2015, 09:34 PM   #2854
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Stillwater Bridge

Some aerial photos of the new Stillwater Bridge under construction at the Minnesota-Wisconsin state line. It spans the St. Croix River, just outside the Minneapolis-St. Paul area.







More photos: http://www.stillwatercurrent.com/20-...begin-april-1/
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Old March 30th, 2015, 01:39 PM   #2855
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Quote:
Originally Posted by ChrisZwolle View Post
The 'Right lane MUST turn right' sign is a bit over the top, the arrow on the pavement already indicates it is a right turn only (otherwise there would've been a through arrow in it as well).
Any lane that ends like that has the arrow and sign.
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Old March 31st, 2015, 12:56 AM   #2856
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indeed, I almost wonder if the pavement marking does not have legal force and only the sign does. certainly once the marking wears away it wouldn't... though the US is usually good about that.
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Old March 31st, 2015, 09:58 AM   #2857
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Quote:
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Bertha (the name of the tunnel boring machine):


Bertha's parking spot by WSDOT, on Flickr
Final section of the cutter head has been successfully raised to the surface. Now begin several months of disassembly and rebuild.

From wsdot.
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Old April 7th, 2015, 08:19 PM   #2858
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Louisiana Route 1

A major multi-phase project in Louisiana is the Highway 1 elevated bridge. It will replace a segment of highway 1 that is prone to flooding and is actually sinking. This is the only road to Port Fourchon, which supplies 18% of the U.S. oil and gas needs.

It is a toll bridge that will eventually span 18 miles of the Mississippi River Delta. Currently about 8.5 miles is completed. It has exit numbers (despite the 'exits' being T-intersections).



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Old April 7th, 2015, 10:26 PM   #2859
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Loop 335, Amarillo, TX

TxDOT has published plans (pdf) for the Loop 335 freeway conversion. It would be a greenfield freeway west of the existing Loop 335 along the western side of Amarillo. And it includes a full stack interchange with 8 direct connectors at I-40. This would actually be Amarillo's first stack interchange, the I-27/40 interchange is a large turbine.

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Old April 8th, 2015, 12:39 AM   #2860
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NJ 15 Northbound in Sussex County,NJ


NJ 15 Northbound in Sussex County,NJ
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