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Author Topic: El Paso - public meeting for proposed unconventional interchange  (Read 2752 times)

MaxConcrete

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See the concept images

http://www.txdot.gov/inside-txdot/get-involved/about/hearings-meetings/el-paso/110413.html

I'm not aware of this type of design anywhere in Texas, although they are used elsewhere. Looking at Google maps, this is currently a conventionally designed interchange.

Big John

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #1 on: October 15, 2013, 11:09:33 PM »

A DDI with Texas U-turns.

Though the Do Not Enter signs on image 2 don't make scene as they are facing the correct direction of travel.
« Last Edit: October 15, 2013, 11:12:41 PM by Big John »
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JREwing78

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #2 on: October 16, 2013, 01:02:23 AM »

There's other issues with the signage; in Image #1, there's supplemental signs below the Yield signs indicating vehicles yield to oncoming traffic. If there's oncoming traffic in that spot, it's because that traffic ended up in the wrong travel lanes.
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longhorn

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #3 on: October 16, 2013, 11:09:38 AM »

How is this more efficient? It looks needlessly more complex.
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jeffandnicole

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #4 on: October 16, 2013, 11:57:41 AM »

There's other issues with the signage; in Image #1, there's supplemental signs below the Yield signs indicating vehicles yield to oncoming traffic. If there's oncoming traffic in that spot, it's because that traffic ended up in the wrong travel lanes.

Why are there yield signs whatsoever at that location?
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agentsteel53

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #5 on: October 16, 2013, 01:32:08 PM »

If there's oncoming traffic in that spot, it's because that traffic ended up in the wrong travel lanes.

"yield to utterly baffled drivers"
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JREwing78

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #6 on: October 16, 2013, 07:11:25 PM »

How is this more efficient? It looks needlessly more complex.
The idea is that you eliminate a signal phase this way, and the remaining phases are longer and move traffic more efficiently. Without this arrangement, you would need to have two sets of protected left turn phases, and possibly have to sit through two light cycles to proceed through the interchange.

It's something that would come in handy on Stoughton Rd. (US-51) in Madison at the Beltline (US-12/18).
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NE2

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #7 on: October 16, 2013, 07:26:58 PM »

A DDI is more efficient when turning volumes are significant and relatively little traffic crosses the freeway. It wouldn't work where the predominant surface movement is straight across.
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Alps

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Re: El Paso - public meeting for proposed unconventional interchange
« Reply #8 on: October 17, 2013, 08:53:44 PM »

Who put yield signs on a signalized movement?

 


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