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Interesting stuff

Started by Some_Person, October 23, 2012, 06:50:21 PM

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agentsteel53

Quote from: Some_Person on November 02, 2012, 12:20:44 PM
This interchange between US 222 Business and US 422 seems to be a diamond interchange, but with its ramps in between the carriageways of 422, rather than outside them, almost like the interchanges on the Pulaski Skyway: http://goo.gl/maps/TEUqP it seems pretty convenient, as there is only one intersection instead of two with traffic going on and off the highway.
I wonder why they don't do that more often.  I can't think of any disadvantages offhand.  maybe sight lines of the exiting traffic, due to the supports of the freeway?
live from sunny San Diego.

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NE2

pre-1945 Florida route log

I accept and respect your identity as long as it's not dumb shit like "identifying as a vaccinated attack helicopter".

agentsteel53

Quote from: NE2 on November 02, 2012, 01:33:03 PM
Maybe left-side ramps...?

good point.  had completely failed to think about that!
live from sunny San Diego.

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jake@aaroads.com

Roadsguy

That one backs up quite a bit. There's also no acceleration/deceleration lanes. I think PennDOT wants to make it a regular diamond.
Mileage-based exit numbering implies the existence of mileage-cringe exit numbering.

sipes23

Quote from: NE2 on November 02, 2012, 01:16:50 PM
Quote from: Some_Person on November 02, 2012, 12:20:44 PM
This interchange between US 222 Business and US 422 seems to be a diamond interchange, but with its ramps in between the carriageways of 422, rather than outside them, almost like the interchanges on the Pulaski Skyway: http://goo.gl/maps/TEUqP it seems pretty convenient, as there is only one intersection instead of two with traffic going on and off the highway.
It's a sort of internal SPUI. I-290 in Chicago has them, and there are others in various places.

Yes, it does. Though I've heard they're going away.

agentsteel53

what about reversing the carriageways, and having a standard right-side X-shaped intersection with a single point in the middle?

or is building carriageways "backwards" just plain too radical a notion?
live from sunny San Diego.

http://shields.aaroads.com

jake@aaroads.com

NE2

It's expensive to build the bridges. And the ramps would be on the wrong side at the intersection - right turns would cross the other ramp.

Perhaps the DDI came from someone thinking along your lines, then realizing reversing the surface road carriageways makes more sense.
pre-1945 Florida route log

I accept and respect your identity as long as it's not dumb shit like "identifying as a vaccinated attack helicopter".

Roadsguy

Well, there is this (now reconfigured) interchange in Baltimore...

http://binged.it/WjjjoS
Mileage-based exit numbering implies the existence of mileage-cringe exit numbering.

cjk374

US 80 in Ruston, LA is interesting.  The stretch of US 80 west of the US 167/LA 146 multiplex is named California Ave.  The stretch east of the multiplex is named Georgia Ave.  Do you see the strange correlation?  :-P
Runnin' roads and polishin' rails.

NE2

Quote from: cjk374 on November 04, 2012, 04:17:34 PM
US 80 in Ruston, LA is interesting.  The stretch of US 80 west of the US 167/LA 146 multiplex is named California Ave.  The stretch east of the multiplex is named Georgia Ave.  Do you see the strange correlation?  :-P
pre-1945 Florida route log

I accept and respect your identity as long as it's not dumb shit like "identifying as a vaccinated attack helicopter".

cjk374

Runnin' roads and polishin' rails.

1995hoo

I like the "DOH" at the top of that. Obviously a map created long before Homer Simpson came along, but that doesn't matter.
"You know, you never have a guaranteed spot until you have a spot guaranteed."
—Olaf Kolzig, as quoted in the Washington Times on March 28, 2003,
commenting on the Capitals clinching a playoff spot.

"That sounded stupid, didn't it?"
—Kolzig, to the same reporter a few seconds later.

kurumi

On a side note, this might be the most generic thread ever:

* Title: Interesting Stuff
* Author: Some_Person
* Board: General Highway Talk
My first SF/horror short story collection is available: "Young Man, Open Your Winter Eye"

jeffandnicole

The longest road in NJ is about 170 miles, but yet NJ has a mileage-based Exit 354 (coming off the Walt Whitman Bridge, the first exit in NJ actually uses PA I-76's exit numbering standards.  Thank the DRPA, which does just about nothing by the book).

Some_Person

#39
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

mcdonaat

Quote from: cjk374 on November 04, 2012, 04:29:02 PM
^^ There ya go!    :cheers:
Agreed - US 80, from California to the west to Georgia to the east.

DOH! Portions of old US 80 east of Monroe are called Dixie Overland Coach Road, and are fun to drive along.

Ian

Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

Here's one at the I-93/US 1 interchange to the north of the Zakim Bridge in Boston.
http://goo.gl/maps/BgtSa
UMaine graduate, former PennDOT employee, new SoCal resident.
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Alps

Quote from: PennDOTFan on November 05, 2012, 09:14:42 PM
Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

Here's one at the I-93/US 1 interchange to the north of the Zakim Bridge in Boston.
http://goo.gl/maps/BgtSa
The former 90 East ramp to 93 South was another left turn ramp, IIRC - 90 crossed under 93, the ramp came up on the east side, then looped over and headed back south to 93S.

deathtopumpkins

Quote from: Steve on November 05, 2012, 09:19:15 PM
Quote from: PennDOTFan on November 05, 2012, 09:14:42 PM
Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

Here's one at the I-93/US 1 interchange to the north of the Zakim Bridge in Boston.
http://goo.gl/maps/BgtSa
The former 90 East ramp to 93 South was another left turn ramp, IIRC - 90 crossed under 93, the ramp came up on the east side, then looped over and headed back south to 93S.

Still is: http://goo.gl/maps/xj4rB
Disclaimer: All posts represent my personal opinions and not those of my employer.

Clinched Highways | Counties Visited

Alps

Quote from: deathtopumpkins on November 06, 2012, 12:48:59 AM
Quote from: Steve on November 05, 2012, 09:19:15 PM
Quote from: PennDOTFan on November 05, 2012, 09:14:42 PM
Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

Here's one at the I-93/US 1 interchange to the north of the Zakim Bridge in Boston.
http://goo.gl/maps/BgtSa
The former 90 East ramp to 93 South was another left turn ramp, IIRC - 90 crossed under 93, the ramp came up on the east side, then looped over and headed back south to 93S.

Still is: http://goo.gl/maps/xj4rB
Oh, THAT'S what merges in on the left!

1995hoo

Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

As of November 17 there will be a part-time left-turn loop ramp in Virginia from the Outer Loop of I-495 to the southbound HOV carriageway on I-95. It's part-time because the HOV lanes on I-95 are reversible and so the ramp will function as a left-turn loop only when the HOV lanes are pointing south–at other times, it will serve as a right-turn loop from the northbound HOV lanes to I-495.

Click on "K" for the HOV ramps and then watch the animations.
"You know, you never have a guaranteed spot until you have a spot guaranteed."
—Olaf Kolzig, as quoted in the Washington Times on March 28, 2003,
commenting on the Capitals clinching a playoff spot.

"That sounded stupid, didn't it?"
—Kolzig, to the same reporter a few seconds later.

Billy F 1988

Quote from: Steve on October 27, 2012, 07:00:06 PM
US 58 runs 508 miles in Virginia. That's gotta be the longest in any Eastern state.

Route 200 is one of the longer state routes from Minnesota through Idaho. I live nearby Montana Rt. 200 in Missoula. The total mileage of MT 200 is 707 miles rounded up.
Finally upgraded to Expressway after, what, seven or so years on this forum? Took a dadgum while, but, I made it!

roadman65

Quote from: Roadsguy on November 03, 2012, 11:16:37 AM
Well, there is this (now reconfigured) interchange in Baltimore...

http://binged.it/WjjjoS
Your link only lets you see the finished result for a brief second.  It immediately goes back to the old configuration.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

Roadsguy

Quote from: roadman65 on November 07, 2012, 04:20:42 AM
Quote from: Roadsguy on November 03, 2012, 11:16:37 AM
Well, there is this (now reconfigured) interchange in Baltimore...

http://binged.it/WjjjoS
Your link only lets you see the finished result for a brief second.  It immediately goes back to the old configuration.

Kinda the point. I was talking about the old configuration, which is why I set it to birds-eye view. :P
Mileage-based exit numbering implies the existence of mileage-cringe exit numbering.

kphoger

Quote from: PennDOTFan on November 05, 2012, 09:14:42 PM
Quote from: Some_Person on November 05, 2012, 08:28:23 PM
This ramp in Delaware from US 202 North to I-95 North is very unique in the fact that it has a left turn loop ramp. I feel like this is one of the only freeway to freeway left turn loop ramps in the US that exists, does anyone know of another?

http://goo.gl/maps/5FZXc

Here's one at the I-93/US 1 interchange to the north of the Zakim Bridge in Boston.
http://goo.gl/maps/BgtSa

Does this one in Dallas count?
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Male pronouns, please.

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