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Old April 12th, 2014, 09:40 PM   #9581
ChrisZwolle
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I-35E / I-635 LBJ Express, Dallas, TX

A new aerial progress tour of the LBJ Express project in Dallas.



Screenshots:




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Old April 13th, 2014, 04:03 PM   #9582
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Quote:
Originally Posted by Innsertnamehere View Post
theres no way that would ever happen.. no way its worth it. Its only a 2x2 lane freeway! rip it down, maybe build a bypass around town if you have to redirect traffic..

as for urban boulevards, they absolutely improve the pedestrian environment. Take a look at the Embarcadaro in SF or the west side highway in NYC. Drivers are expecting lights and pedestrians, and drivers are travelling much slower. Compare to freeway off ramps where they come barrelling down, braking for the light from 70mph instead of 35 or 40 mph. The key to creating a more ped. friendly environment is to slow traffic down and create eye contact with the peds and drivers, which urban boulevards do and freeways don't. Never mind the overhead structures of elevated freeways that create an environment that is extremely unwelcoming.

Compare this:


To this:



Which one would you rather cross as a pedestrian?
I wasn't going to reply to this, because I don't think you're ever going to agree with me, but I will say that it isn't impossible to build an elevated structure with a surface road network that is difficult to cross as a pedestrian. Most elevated structures were built during the 1950s to an earlier set of roadway design standards. There would be nothing stopping a designer from building an elevated structure over-top of the road pictured in the second screen shot.
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Old April 13th, 2014, 04:49 PM   #9583
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Counting lanes can be a difficult task sometimes... They are so many!
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Old April 16th, 2014, 09:47 AM   #9584
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Quote:
Originally Posted by ChrisZwolle View Post
A new aerial progress tour of the LBJ Express project in Dallas.



Screenshots:




Nice ...
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Old April 16th, 2014, 08:34 PM   #9585
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Texas knows how to build highways.
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Old April 17th, 2014, 06:08 PM   #9586
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I-610, Houston, TX

Construction is well underway to widen this narrow 12-lane section of I-610.

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Old April 18th, 2014, 03:05 AM   #9587
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^"narrow"
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Old April 18th, 2014, 06:15 AM   #9588
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Quote:
Originally Posted by ChrisZwolle View Post
Construction is well underway to widen this narrow 12-lane section of I-610.

Texas is the king of freeways by far, no country come even close to match the great state of Texas in highways
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Old April 18th, 2014, 06:33 AM   #9589
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Quote:
Originally Posted by ChrisZwolle View Post
A new aerial progress tour of the LBJ Express project in Dallas.


This is going to be a disaster. It will only make traffic worse. Every time you merge two four lane freeways or more into one of the same, guess what... you will get a bottle neck. On the 635, having an "extra freeway's" worth of cars exiting on the same exit as the "regular" 635, just before the Dallas North Toll Way, and then the same after I-75, will back up both the Regular and Express parts of 635. The reason the 635 was a disaster to begin with was because it was already "too big"... bigger than all the other freeways it merges with. It's simple physics. More flow than capacity equals "backup". What they have done with this project is doubled that problem.

Here is a slightly better video.



For the system to work the "Express 635" would have to be completely separate from the regular 635, specifically with completely separate exits to different locations so the cars from the two can never intermix. Instead, from the video it looks like the exits merge into one, both exiting into the same destination.
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Old April 18th, 2014, 08:18 AM   #9590
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Texas is the king of freeways by far, no country come even close to match the great state of Texas in highways
For its size, UAE has epic highways.
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Old April 18th, 2014, 10:51 AM   #9591
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Quote:
Originally Posted by Innsertnamehere View Post
^"narrow"

There will be 33 lanes, including frontage roads and bus lanes, when this project is completed.
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Old April 18th, 2014, 10:53 AM   #9592
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Quote:
Originally Posted by siamu maharaj View Post
For its size, UAE has epic highways.
Mostly due to the large number of lanes. Technically their highways aren't as well-designed. Sometimes you'll see cloverleafs where two 12-lane freeways cross, or huge amounts of weaving within a short distance. Apparently there are problems with drainage as well (there reportedly isn't any).
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Old April 18th, 2014, 12:07 PM   #9593
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Quote:
Originally Posted by ChrisZwolle View Post

There will be 33 lanes, including frontage roads and bus lanes, when this project is completed.
Only 33 lanes? Meh....
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Old April 18th, 2014, 12:44 PM   #9594
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I-10 Katy Freeway, Houston, TX

I calculated some data of the recently widened Interstate 10 Katy Freeway in West Houston. The Katy Freeway was drastically widened between 2006 and 2008.

The freeway and managed toll lanes have seen a huge surge in traffic volumes. This is partly due to population growth, but also due to a rerouting in traffic. The AADT declined on alternate routes (Westpark Tollway, US 59, US 290) and jumped on I-10.

It is notable that traffic growth was almost exclusively in the suburbs, the traffic volumes remained pretty much stagnant closer to Downtown Houston.

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Old April 18th, 2014, 01:21 PM   #9595
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These works can be seen from airplane when one arrives or departures Houston Hobby airport with Southwest Airlines. Was there earlier this week but was too lazy to take pictures.
Go, Texas!
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Old April 18th, 2014, 05:56 PM   #9596
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Quote:
Originally Posted by ChrisZwolle View Post
Construction is well underway to widen this narrow 12-lane section of I-610.

That part needs it. It's essentially a massive interchage between 290 and 10 with 610 going through the middle to complicate matters.
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Old April 18th, 2014, 06:07 PM   #9597
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Another part of I-610 that needs more capacity badly is between I-10 and US 59 (West Loop). That eight-lane stretch of freeway carries 292,000 vehicles per day. This is likely the highest volume eight-lane freeway in the world. A widening would already be necessary at 200,000 vpd.

Given the lack of space for a Katy-style widening, I think elevated toll lanes are the best option for the west loop.
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Old April 19th, 2014, 01:10 AM   #9598
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Quote:
Originally Posted by AnOldBlackMarble View Post
This is going to be a disaster. It will only make traffic worse. Every time you merge two four lane freeways or more into one of the same, guess what... you will get a bottle neck. On the 635, having an "extra freeway's" worth of cars exiting on the same exit as the "regular" 635, just before the Dallas North Toll Way, and then the same after I-75, will back up both the Regular and Express parts of 635. The reason the 635 was a disaster to begin with was because it was already "too big"... bigger than all the other freeways it merges with. It's simple physics. More flow than capacity equals "backup". What they have done with this project is doubled that problem.

Here is a slightly better video.



For the system to work the "Express 635" would have to be completely separate from the regular 635, specifically with completely separate exits to different locations so the cars from the two can never intermix. Instead, from the video it looks like the exits merge into one, both exiting into the same destination.
It is completely seperate. Has its own exits and its own interchange at I-35e/I-635. Where it doesn't have a seperate interchange, it exits onto the frontage road earlier.
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Old April 21st, 2014, 02:44 PM   #9599
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I-8 in California, West of El Centro

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Old April 21st, 2014, 09:27 PM   #9600
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Interstate 422, Birmingham, AL

Construction commenced on the first stretch of Interstate 422 around Birmingham, Alabama. The first segment is only 1.3 miles long and will open in 2016.

http://www.myfoxal.com/story/2529945...thern-beltline
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