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Author Topic: SW Pennsylvania  (Read 83155 times)

Mr_Northside

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Re: SW Pennsylvania
« Reply #225 on: August 24, 2021, 04:14:01 PM »

I viewed the proposed design, I wonder how they will get any hazmat/oversize that overshot the exit off the highway.

They'll probably just turn them around at the base of the tunnels.  That's what they started doing with the inbound Squirrel Hill tunnel.   They used to try and direct traffic off @ Edgewood / Swissvale with detectors and lights, but they shifted that a few years ago to the tunnel plaza.   What sucks about making that standard operating procedure is it requires that traffic be stopped while the over-height vehicle turns around.
(Outbound [EB] over-height traffic is directed to get off @ Squirrel Hill when the lights are flashing)

Quote
The concern I have is more of runaway trucks using the ramp instead of the escape ramp, since they are so close.
I've always kind of wondered how much use that runaway truck ramp gets. 
« Last Edit: August 24, 2021, 04:16:18 PM by Mr_Northside »
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rickmastfan67

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Re: SW Pennsylvania
« Reply #226 on: August 24, 2021, 07:27:04 PM »

Quote
The concern I have is more of runaway trucks using the ramp instead of the escape ramp, since they are so close.
I've always kind of wondered how much use that runaway truck ramp gets.

Enough to be justified I'm sure.  It's almost always not needed during Rush Hour though, due to traffic going at a snails pace already due to the weave condition at the bottom of the hill.

rickmastfan67

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Re: SW Pennsylvania
« Reply #227 on: August 24, 2021, 07:40:59 PM »

PennDOT - District 11 News: I-376 Banksville Interchange Project Online Virtual Public Open House Thursday

Watching the video, I hope somebody pointed out the following to them in the animation that might still cause a lot of trouble.

They show Banksville Road merging onto I-376 with 2 lanes and with the 2 lanes from I-376, merging into only 3 lanes.  That will be a nightmare trying to force 2 lanes of traffic into one lane (the right lane on I-376 & the left lane on the ramp from Banksville to form a 'middle' lane).  They really need to turn Banksville into a single lane by the time of the merge onto I-376.

JoeP2

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Re: SW Pennsylvania
« Reply #228 on: October 18, 2021, 03:27:35 PM »

So in catching, I see the comments about the Banksville changes, but it seems for years there were planned changes to Greentree (and maybe Carnegie?) - what happened to those interchange/ramp changes. It's really appalling that Greentree has the most asinine and unsafe ramps imaginable.
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lepidopteran

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Re: SW Pennsylvania
« Reply #229 on: October 18, 2021, 11:13:03 PM »

In reference to the Banksville Interchange, you know how the highway runs under two adjacent railroad bridges, one taller and one shorter?  Surprisingly, the shorter bridge is still present in the "after" video, even though it looks like the tracks across it haven't been used in a long time (and another bridge that took them over Route 51 along the river was removed sometime within the last 10 years).  You'd think having those abutments out of the way would make for a wider roadway.
« Last Edit: October 19, 2021, 12:47:06 AM by lepidopteran »
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Bitmapped

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Re: SW Pennsylvania
« Reply #230 on: October 22, 2021, 09:54:07 AM »

In reference to the Banksville Interchange, you know how the highway runs under two adjacent railroad bridges, one taller and one shorter?  Surprisingly, the shorter bridge is still present in the "after" video, even though it looks like the tracks across it haven't been used in a long time (and another bridge that took them over Route 51 along the river was removed sometime within the last 10 years).  You'd think having those abutments out of the way would make for a wider roadway.

The lower bridge is the former W&LE West End Branch. It's been out of service for about a decade, and I believe it is now officially abandoned. The upper bridge is still in-service.

Removing the median pier from the low bridge doesn't buy you anything because you still have the piers from the high bridge. Removing the right abutment doesn't really get you anything, either, because there is a large retaining wall right in front of it that supports a pier for the high bridge. To move that retaining wall back appreciably (or at all?) you'd have to rebuilt large parts of the high railroad bridge. The land behind the bridge abutments also appears to be park, which adds another level of challenge to this.

Basically, unless you're willing to drop a lot of extra money, you're basically stuck with what you've got.
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74/171FAN

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Re: SW Pennsylvania
« Reply #231 on: October 22, 2021, 10:07:26 AM »

In I-70 news, I found out this morning that the I-70/PA 31 conversion from a cloverleaf interchange to a diamond interchange and the reconstruction of I-70 is substantially complete.
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lepidopteran

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Re: SW Pennsylvania
« Reply #232 on: October 22, 2021, 02:44:19 PM »

According to the project website, the plan also reconstructed the surrounding section of I-70, which included increasing the radius of two curves.

One thing the map does not indicate are traffic signals at the new diamond ramps.  That in itself says something about how overbuilt the full cloverleaf was.

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ARMOURERERIC

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Re: SW Pennsylvania
« Reply #233 on: October 22, 2021, 05:43:21 PM »

In reference to the Banksville Interchange, you know how the highway runs under two adjacent railroad bridges, one taller and one shorter?  Surprisingly, the shorter bridge is still present in the "after" video, even though it looks like the tracks across it haven't been used in a long time (and another bridge that took them over Route 51 along the river was removed sometime within the last 10 years).  You'd think having those abutments out of the way would make for a wider roadway.

The lower bridge is the former W&LE West End Branch. It's been out of service for about a decade, and I believe it is now officially abandoned. The upper bridge is still in-service.

Removing the median pier from the low bridge doesn't buy you anything because you still have the piers from the high bridge. Removing the right abutment doesn't really get you anything, either, because there is a large retaining wall right in front of it that supports a pier for the high bridge. To move that retaining wall back appreciably (or at all?) you'd have to rebuilt large parts of the high railroad bridge. The land behind the bridge abutments also appears to be park, which adds another level of challenge to this.

Basically, unless you're willing to drop a lot of extra money, you're basically stuck with what you've got.

I thought I saw where one of the bridges was a historical landmark.
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74/171FAN

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74/171FAN

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Re: SW Pennsylvania
« Reply #235 on: November 22, 2021, 05:53:43 PM »

When driving I-376 recently, I noticed that some signs were calling the I-376 BL a BS (so some signs show it as a Business Spur instead of a Business Loop).  I emailed District 11 today, and I received clarification that it is still a business loop so I guess those signs are an error.
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74/171FAN

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