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Author Topic: Highest overpasses  (Read 81708 times)

Some_Person

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Highest overpasses
« on: February 08, 2013, 11:05:08 PM »

Most separate-grade overpasses are in the 15-20' range above the road/highway. However, due to higher land or a hill nearby, some highways have overpasses that are very tall, here's an interesting example I have: http://goo.gl/maps/ifFE6 (I-476 over US-6/11). I don't know the exact height but it looks like it could be at least 100 feet. Anyone else have cool examples to share?
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JREwing78

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Re: Highest overpasses
« Reply #1 on: February 08, 2013, 11:55:06 PM »

This one over the Ohio Turnpike is a definite candidate: http://goo.gl/maps/MEDj7
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Bruce

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Re: Highest overpasses
« Reply #2 on: February 09, 2013, 12:33:34 AM »

Another arch bridge, over SR 7 in Tacoma. http://goo.gl/maps/Dg7UB

Alex

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Re: Highest overpasses
« Reply #3 on: February 09, 2013, 01:34:52 AM »

Two that come to mind are the Kingwood Pike bridge over I-68 at Morgantown:



and the Lilac Road bridge over I-15 in San Diego County:

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Re: Highest overpasses
« Reply #5 on: February 09, 2013, 12:37:13 PM »

Here's one over I-890: http://goo.gl/maps/2CdJv
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roadman65

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Re: Highest overpasses
« Reply #6 on: February 09, 2013, 01:38:53 PM »

« Last Edit: February 09, 2013, 01:41:02 PM by roadman65 »
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Re: Highest overpasses
« Reply #7 on: February 09, 2013, 10:55:45 PM »

Many of your additions beat mine, but this is Heatherdell Road over the Sprain Brook Parkway:
https://maps.google.com/maps?q=41.031944,-73.833056&ll=41.017146,-73.825035&spn=0.013486,0.01929&t=h&z=16&layer=c&cbll=41.017062,-73.825113&panoid=JRqap36IsSC5l0FrVO4QtQ&cbp=12,37.14,,0,0

NYSDOT Region #8 told me personally in a letter that the clearance was 43 feet and 6 inches.

Although Ugly Bridges takes a few inches away from the DOT:
http://uglybridges.com/1392740

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amroad17

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Re: Highest overpasses
« Reply #8 on: February 09, 2013, 11:53:18 PM »

Most separate-grade overpasses are in the 15-20' range above the road/highway. However, due to higher land or a hill nearby, some highways have overpasses that are very tall, here's an interesting example I have: http://goo.gl/maps/ifFE6 (I-476 over US-6/11). I don't know the exact height but it looks like it could be at least 100 feet. Anyone else have cool examples to share?
That one always impressed me ever since I was 10 years old.

A couple off the top of my head...

The overpass just west of exit 15 on I-64 in Huntington, WV. (West Pea Ridge Rd.)
I-26/US 23 over Big Laurel Road just north of exit 3 in NC. (Might be 150-200 ft. high)
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Re: Highest overpasses
« Reply #9 on: February 10, 2013, 12:01:28 AM »

Never saw it in person, but the Mulholland overpass over I-405 looks pretty high, though it's gonna be replaced soon.

There's also the arched railroad overpass over the Arroyo Seco Pkwy.
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lepidopteran

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Re: Highest overpasses
« Reply #10 on: February 10, 2013, 12:11:39 AM »

The Pittsburgh area seems to have lots of these.  There are at least two locations where the Mon-Fayette Expressway south of Pittsburgh runs quite high over other roads and a river.  Then there's the Greenfield Bridge over Parkway East, though that's slated to be demolished soon (with a larger structure to replace it?)

And on I-279, there are two really high railroad overpasses on the way to the Fort Pitt Tunnel.    I think there's also one over I-77 near Princeton, WV.

When they were under construction, I found the ramps for the Pocahontas Parkway (VA-895) near Richmond, VA to be jaw-dropping tall.
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lepidopteran

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Re: Highest overpasses
« Reply #12 on: February 10, 2013, 12:52:45 AM »

One puzzling example is the northern/eastern end of the Newark Bay Extension of the New Jersey Turnpike (I-78).  If you ever got on this highway after entering NJ through the Holland Tunnel, you may have noticed that the northbound lanes coming the opposite direction are high up in the air.  This is apparent even if you don't realize that the road you're on is also elevated (probably due to a railroad that curves under it, twice), and consequently the northbound lanes are that much higher off the ground!  Never did understand why the northbound road was that much taller, since the added height seems to serve no practical purpose.  I think I heard that it was to allow for another highway in the interchange that was cancelled or planned.

Edit:  View of the northbound (higher) roadway from the southbound (lower) roadway. 
http://goo.gl/maps/Ej3fW
« Last Edit: February 10, 2013, 11:41:23 PM by lepidopteran »
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SteveG1988

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Re: Highest overpasses
« Reply #13 on: February 10, 2013, 09:50:34 AM »

One puzzling example is the northern/eastern end of the Newark Bay Extension of the New Jersey Turnpike (I-78).  If you ever got on this highway after entering NJ through the Holland Tunnel, you may have noticed that the northbound lanes coming the opposite direction are high up in the air.  This is apparent even if you don't realize that the road you're on is also elevated (probably due to a railroad that curves under it, twice), and consequently the northbound lanes are that much higher off the ground!  Never did understand why the northbound road was that much taller, since the added height seems to serve no practical purpose.  I think I heard that it was to allow for another highway in the interchange that was cancelled or planned.

It looks like in birds eye view, that it was made to meet up with NJ 139, perhaps it was easier to keep the road high and have it make a curve in the air than to go around it due to space constraints.
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Some_Person

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Re: Highest overpasses
« Reply #14 on: February 10, 2013, 06:34:20 PM »

PA 43 is really high above this road: http://goo.gl/maps/2BaiY as well as this one: http://goo.gl/maps/JvqZp

There's also the well known VA 895 example that I believe was mentioned earlier: http://goo.gl/maps/V2wKZ

I-78 is pretty high above this road in East PA: http://goo.gl/maps/s29ZC

The Verrazano-Narrows bridge is pretty high above the Belt Pkwy, a pretty amazing view of the bridge: http://goo.gl/maps/w38eK
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Re: Highest overpasses
« Reply #15 on: February 10, 2013, 08:09:54 PM »

Here's one over I-890: http://goo.gl/maps/2CdJv

Unfortunately, this overpass carries Hulett Street rather than Highbridge Road, which crosses over I-890 via a much lower overpass a few miles to the east.
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Re: Highest overpasses
« Reply #16 on: February 10, 2013, 08:25:07 PM »

and the Lilac Road bridge over I-15 in San Diego County:


That's the one I thought of when I first saw this thread! I didn't know the name of it, but it really intrigued me when I was down there! I took the parallel Rainbow Canyon Road once, but it didn't intrigue me as much as that bridge (though it was nice to get out of four-lane traffic) :sombrero:
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Re: Highest overpasses
« Reply #17 on: February 10, 2013, 09:11:08 PM »

http://tinyurl.com/b82dmpa

I thought this one was a little bit taller than it actually seems to be. Shades Crest Road over I-459 near Bessemer.
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Re: Highest overpasses
« Reply #19 on: February 11, 2013, 09:31:09 AM »

The first one that came to my mind was this: http://goo.gl/maps/Brcpy —although it now seems like a pretty weak submission. I remember it striking me as much higher, though I believe it does look higher in real life than Street View suggests.

PA 43 is really high above this road: http://goo.gl/maps/2BaiY as well as this one: http://goo.gl/maps/JvqZp

From the term "overpass", I also was mentally discounting certain other categories, such as structures more elaborate than simple girder-and-concrete-bent spans, or those cases where the crossing is part of a larger viaduct or bridge system. That makes the PA 43 examples interesting, since they are simple span types, but are they mere overpasses? They're designed to cross a valley that happens to contain a road; if the road weren't there, they'd be needed anyway. What about cases where the overpass exists only to cross a road, and would not have been built had the road not existed?

The I-15/Lilac Road example seems to be one of those; that doesn't look like a natural valley that I-15 is in.
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Re: Highest overpasses
« Reply #20 on: February 11, 2013, 09:42:06 AM »

the highest signed one I've ever seen is 26'3.  I believe it is on State Street in Fontana, CA.
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Re: Highest overpasses
« Reply #21 on: February 11, 2013, 10:33:35 PM »

North end of I-476 (Pennsylvania Turnpike's Northeast Extension over U.S. 6/U.S. 11) is pretty high (GSV here).  And I just noticed that this is what the OP mentioned.

Though that Turnpike bridge is a runt when compared to this structure (also GSV), located a few miles to the  north on U.S. 11 (though it does not carry highway traffic).  More details here (Wikipedia).

And then there's le Viaduc de Millau (Wikipedia), which  carries the A75 autoroute over the valley of the Tarn River in France. Official Web site (in English) here.  GSV from below the viaduct here.  GSV from the deck of the viaduct here.

« Last Edit: February 11, 2013, 10:48:13 PM by cpzilliacus »
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empirestate

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Re: Highest overpasses
« Reply #22 on: February 11, 2013, 10:42:52 PM »

And then there's le Viaduc de Millau, which  carries the A75 autoroute over the valley of the Tarn River in France. Official Web site (in English) here.  GSV from below the viaduct here.



I appreciate that it has transparent guide rails.
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cpzilliacus

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Re: Highest overpasses
« Reply #23 on: February 11, 2013, 10:47:05 PM »

I appreciate that it has transparent guide rails.

Yep.  Went back and added a hyperlink to a view from the deck of the viaduct. 

Thank you for pointing that out.
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Re: Highest overpasses
« Reply #24 on: February 11, 2013, 10:56:05 PM »

Don't think this is the highest of the bunch, but it gets an honorable mention - appropriately-named Ridge Road over I-70 (GSV) in Braddock Heights, Frederick County, Maryland.

And there's a pretty tall structure that carries I-68 over Md. 144 ("old" U.S. 40, also GSV) east of Cumberland in Allegany County, Maryland.
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