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Author Topic: Old vs new bridges  (Read 10811 times)

tolbs17

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Re: Old vs new bridges
« Reply #75 on: July 23, 2021, 11:29:09 PM »

These bridges do not match.

They were built almost 15 years apart...why do they need to match?
Talking about how the way they were built. They probably didn't even think they were going to extend the highway. The left barrier is taller compared to the right barrier.
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Mapmikey

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Re: Old vs new bridges
« Reply #76 on: July 24, 2021, 09:12:58 AM »

These bridges do not match.

They were built almost 15 years apart...why do they need to match?
Talking about how the way they were built. They probably didn't even think they were going to extend the highway. The left barrier is taller compared to the right barrier.

For someone who notices small differences in stuff (which you should come out and say in the initial post instead of us guessing), you miss the bigger pictures.

Yes, it is true the left barrier is taller than the right one.  If you check out older streetviews, you will notice the bridge has been widened and I believe they wanted the left barrier to be the same height as the new bridge's left barrier.  This actually supports your theory that they weren't 100% sure the road would get extended (though they definitely knew they wanted to, as it was signed as Future I-840 by 2002).

A much bigger difference in the two bridges can be seen from a different viewpoint - https://goo.gl/maps/cXaPpRpzSPtRjBbu7

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tolbs17

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Re: Old vs new bridges
« Reply #77 on: July 24, 2021, 07:19:58 PM »

These bridges do not match.

They were built almost 15 years apart...why do they need to match?
Talking about how the way they were built. They probably didn't even think they were going to extend the highway. The left barrier is taller compared to the right barrier.

For someone who notices small differences in stuff (which you should come out and say in the initial post instead of us guessing), you miss the bigger pictures.

Yes, it is true the left barrier is taller than the right one.  If you check out older streetviews, you will notice the bridge has been widened and I believe they wanted the left barrier to be the same height as the new bridge's left barrier.  This actually supports your theory that they weren't 100% sure the road would get extended (though they definitely knew they wanted to, as it was signed as Future I-840 by 2002).

A much bigger difference in the two bridges can be seen from a different viewpoint - https://goo.gl/maps/cXaPpRpzSPtRjBbu7
I say it should have been built as a T intersection until an extension was put there or just make a wide bridge. Then it would look more handy. But it looks awkward.
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kphoger

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Re: Old vs new bridges
« Reply #78 on: July 25, 2021, 05:10:46 PM »

But it looks awkward.

well we don't want that
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tolbs17

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Re: Old vs new bridges
« Reply #79 on: July 25, 2021, 05:12:08 PM »

But it looks awkward.

well we don't want that
I mean like, how were they thinking when they were thinking about extending the highway...
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dlsterner

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Re: Old vs new bridges
« Reply #80 on: July 25, 2021, 07:02:10 PM »

These bridges do not match.
If the poster is concerned about the above bridges not matching (they look almost identical to me), image the hysteria resulting from our mis-matched Bay Bridges across the Chesapeake:



And I would guess a third bridge (if ever built in our lifetimes) would be visually different as well.

tolbs17

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Re: Old vs new bridges
« Reply #81 on: July 25, 2021, 07:17:48 PM »

These bridges do not match.
If the poster is concerned about the above bridges not matching (they look almost identical to me), image the hysteria resulting from our mis-matched Bay Bridges across the Chesapeake:



And I would guess a third bridge (if ever built in our lifetimes) would be visually different as well.
Compared to these, or even these?

Hell, even these do not match.
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tolbs17

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Re: Old vs new bridges
« Reply #82 on: July 27, 2021, 11:10:24 PM »

When looking at these bridges, you may wonder why they are very high (I've seen some ones that are a little lower to carry trains), And the reason is cause of the low voltage lines and a nearby river next to a road.

Like hell, even these are lower.
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Mapmikey

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Re: Old vs new bridges
« Reply #83 on: July 28, 2021, 06:25:01 AM »

When looking at these bridges, you may wonder why they are very high (I've seen some ones that are a little lower to carry trains), And the reason is cause of the low voltage lines and a nearby river next to a road.

Like hell, even these are lower.

The first bridge is that high because it crosses the Intracoastal Waterway.  Otherwise it would need to be a draw bridge.

The second bridge can be lower because trains are not as tall as sailboats.
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kphoger

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Re: Old vs new bridges
« Reply #84 on: July 28, 2021, 09:59:34 AM »


When looking at these bridges, you may wonder why they are very high (I've seen some ones that are a little lower to carry trains), And the reason is cause of the low voltage lines and a nearby river next to a road.

Like hell, even these are lower.

The first bridge is that high because it crosses the Intracoastal Waterway.  Otherwise it would need to be a draw bridge.

The second bridge can be lower because trains are not as tall as sailboats.

If it were all about the power lines, then I'm sure it would have been a lot cheaper to just run them underground at that point or else construct taller towers and run them over both roads.
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snowc

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MCRoads

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Re: Old vs new bridges
« Reply #86 on: September 14, 2021, 09:36:57 AM »

These bridges do not match.
If the poster is concerned about the above bridges not matching (they look almost identical to me), image the hysteria resulting from our mis-matched Bay Bridges across the Chesapeake:



And I would guess a third bridge (if ever built in our lifetimes) would be visually different as well.

If a third bridge is built, what do you want to bet that it will be a precast box beam, with a cable stayed main span?
I hate those types of bridges, as they are used so much. But, they are used a lot because they are cheap.
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more room plz

snowc

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Re: Old vs new bridges
« Reply #87 on: September 21, 2021, 08:09:23 PM »

https://www.google.com/maps/@35.4447724,-80.6133352,3a,75y,262.09h,102.8t/data=!3m7!1e1!3m5!1sqjkbqC6Ck5ABhMUyw8_qgg!2e0!5s20210801T000000!7i16384!8i8192
Another one of a recycled bridge. When I85 was rebuilt in 2016, they took everything but the guardrail. :ded:
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tolbs17

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Re: Old vs new bridges
« Reply #88 on: September 22, 2021, 07:55:04 PM »

https://www.google.com/maps/@35.4447724,-80.6133352,3a,75y,262.09h,102.8t/data=!3m7!1e1!3m5!1sqjkbqC6Ck5ABhMUyw8_qgg!2e0!5s20210801T000000!7i16384!8i8192
Another one of a recycled bridge. When I85 was rebuilt in 2016, they took everything but the guardrail. :ded:
Are you referring to this guardrail? If yes, then it's because it's dangerously close to the mainline highway.
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snowc

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Re: Old vs new bridges
« Reply #89 on: September 27, 2021, 03:40:25 PM »

https://www.google.com/maps/@35.4447724,-80.6133352,3a,75y,262.09h,102.8t/data=!3m7!1e1!3m5!1sqjkbqC6Ck5ABhMUyw8_qgg!2e0!5s20210801T000000!7i16384!8i8192
Another one of a recycled bridge. When I85 was rebuilt in 2016, they took everything but the guardrail. :ded:
Are you referring to this guardrail? If yes, then it's because it's dangerously close to the mainline highway.
The guardrail is on the bridge that is in the picture.
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tolbs17

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Re: Old vs new bridges
« Reply #90 on: October 11, 2021, 03:41:29 PM »

So, when bringing a freeway to interstate standards, this plan shows that the bridges that the main freeway bridge over will be replaced. They look fine to me... I don't see why they need to be replaced.

https://www.ncdot.gov/projects/us-17-feasibility-study/Documents/us-17-segment-6.pdf

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Mapmikey

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Re: Old vs new bridges
« Reply #91 on: October 11, 2021, 08:11:55 PM »

So, when bringing a freeway to interstate standards, this plan shows that the bridges that the main freeway bridge over will be replaced. They look fine to me... I don't see why they need to be replaced.

https://www.ncdot.gov/projects/us-17-feasibility-study/Documents/us-17-segment-6.pdf



All of the southbound bridges were built in 1976, so they will be pushing 50 years old when they get around to doing construction.

The northbound bridges were built in 1999.  Less sure why they would want to replace those at the outset unless they don't meet interstate standard in some way.
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tolbs17

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Re: Old vs new bridges
« Reply #92 on: October 12, 2021, 12:09:57 AM »

So, when bringing a freeway to interstate standards, this plan shows that the bridges that the main freeway bridge over will be replaced. They look fine to me... I don't see why they need to be replaced.

https://www.ncdot.gov/projects/us-17-feasibility-study/Documents/us-17-segment-6.pdf


The northbound bridges were built in 1999.  Less sure why they would want to replace those at the outset unless they don't meet interstate standard in some way.
Which is funny cause the US-264 bridges east of Wilson are older and it's already up to interstate standards and yet they didn't replace the bridges. I'm referring to the the Farmville bypass (US-258) and the VOA Site C rd bridges.
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tolbs17

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Re: Old vs new bridges
« Reply #93 on: October 12, 2021, 09:53:26 PM »

Seems like MSE walls are the new standard bridges for construction.
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tolbs17

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Re: Old vs new bridges
« Reply #94 on: October 24, 2021, 02:21:38 AM »

I didn't know they still build bridges like this.

I thought they stopped with this design...

I normally see double rails as the standard.

The Greenville Southwest Bypass (NC 11 bypass) bridges (which is kind of rare for freeways to have here in North Carolina except for older ones built back in the 60s and 70s) has the double railings over NC 903 and Abbott Farm Road.
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tolbs17

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Re: Old vs new bridges
« Reply #95 on: November 01, 2021, 07:10:48 AM »

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Mapmikey

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Re: Old vs new bridges
« Reply #96 on: November 01, 2021, 10:28:04 AM »

This bridge did not keep the same design. I also wonder why they made it extra wide compared to some bridges I see are narrower than that.

2008 - GSV https://www.google.com/maps/@36.078266,-77.7484517,3a,75y,9.6h,83.31t/data=!3m6!1e1!3m4!1sF6zeCY5HRurrVBU3SjfcsQ!2e0!7i3328!8i1664

2016 - GSV https://www.google.com/maps/@36.078279,-77.7484316,3a,75y,9.6h,83.31t/data=!3m7!1e1!3m5!1sjXJ_YZNGarVa9gAO1a8SoQ!2e0!5s20160701T000000!7i13312!8i6656

The ornate rail designs tend to be propagated on modern bridges only in cities for aesthetic purposes. 

They gave the new bridge shoulders...not sure why that is considered extra wide.  It is US 301 and does see the occasional tractor trailer, so having a shoulder makes some sense.
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Big John

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Re: Old vs new bridges
« Reply #97 on: November 01, 2021, 09:42:17 PM »

^^ The shoulders are a safety measure and for a 2-lane 2-way traffic it is recommended to be 10' wide each.
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