Pennsylvania

[74/171FAN]

(For US 62)  PennDOT - District 1 News: Weight Limit Posted on Route 62 Bridge in Warren County

Since work is planned in 2022, I see no reason to add the latest alternate truck route to Travel Mapping.   

(For US 62)  PennDOT - District 1 News: Stop Signs in Place at Route 62 Bridge in Warren County

[SkyPesos]

I've read somewhere that I-70, I-76 (or I-80S back then) and I-79 all used to pass through Downtown Pittsburgh at some point in its history, and it seems like that all three used the section of what is now I-376 between I-79 and I-279 to get to downtown from the south and west. Did all three interstates use that segment/go through downtown Pittsburgh at the same time? If so, that could most likely be the first 2di triplex in the interstate system's history, predating I-55/64/70 and I-39/90/94.

[ixnay]

I've read somewhere that I-70, I-76 (or I-80S back then) and I-79 all used to pass through Downtown Pittsburgh at some point in its history, and it seems like that all three used the section of what is now I-376 between I-79 and I-279 to get to downtown from the south and west. Did all three interstates use that segment/go through downtown Pittsburgh at the same time? If so, that could most likely be the first 2di triplex in the interstate system's history, predating I-55/64/70 and I-39/90/94.

Part of the (Penn Lincoln) Parkway West, and also 1) utilizing the Fort Pitt Bridge and Fort Pitt Tunnel(s) and 2) carrying US Routes 22 and 30.

[rickmastfan67]

I've read somewhere that I-70, I-76 (or I-80S back then) and I-79 all used to pass through Downtown Pittsburgh at some point in its history, and it seems like that all three used the section of what is now I-376 between I-79 and I-279 to get to downtown from the south and west. Did all three interstates use that segment/go through downtown Pittsburgh at the same time? If so, that could most likely be the first 2di triplex in the interstate system's history, predating I-55/64/70 and I-39/90/94.

According to PA Highways website, none of them were posted at the same time on the Parkway West.

Code Select Expand

I-70 (1960 - 1964):  Exit 64A to I-76/PA Turnpike
I-79 (1964 - 1972):  Exit 64A to Exit 70C
I-76 (1972 - 1973):  Exit 64A to Exit 70C
I-279 (1973 - 2009):  Exit 64A to Exit 70C
I-376 (2009 - current): Exit 64A to Exit 70C

[roadman65]

Why does SB I-83 for Lowether Street sign Exit 6C for the loop ramp just south of PA  581?

[74/171FAN]

Why does SB I-83 for Lowether Street sign Exit 6C for the loop ramp just south of PA  581?

That is because the ramp for Lowther St is part of the PA 581 EB ramp to I-83 SB.  There is no way to access this ramp from I-83 SB itself.

I-83 SB traffic must access Lowther St via Exit 41B here.

[roadman65]

Then PA 581 uses sequential exit numbers then?  I guess not being interstate PennDOT don't see the need to convert.

[MATraveler128]

PA 378 I think uses sequential numbering. There's a split E-W suffix there.

[74/171FAN]

Then PA 581 uses sequential exit numbers then?  I guess not being interstate PennDOT don't see the need to convert.

Well PA 581 is also only seven miles long.  You might would convert Exit 6, and they may be it.

[famartin]

Then PA 581 uses sequential exit numbers then?  I guess not being interstate PennDOT don't see the need to convert.

Well PA 581 is also only seven miles long.  You might would convert Exit 6, and they may be it.

Speaking of 581, is there any practical benefit in having 11 follow 581 for the short distance it does? It seems like a pointless re-route.

[roadman65]

Then PA 581 uses sequential exit numbers then?  I guess not being interstate PennDOT don't see the need to convert.

Well PA 581 is also only seven miles long.  You might would convert Exit 6, and they may be it.

Speaking of 581, is there any practical benefit in having 11 follow 581 for the short distance it does? It seems like a pointless re-route.

That was left over from when PA 581 ended at Carlisle Pike. There was no PA 581 and US 11 was its number plus a short PennDOT reference route between US 15 and I-83.

[74/171FAN]

^At this point, the US 11 reroute is probably still there to keep traffic from following Market St into US 11/US 15 in Camp Hill.

[famartin]

Then PA 581 uses sequential exit numbers then?  I guess not being interstate PennDOT don't see the need to convert.

Well PA 581 is also only seven miles long.  You might would convert Exit 6, and they may be it.

Speaking of 581, is there any practical benefit in having 11 follow 581 for the short distance it does? It seems like a pointless re-route.

That was left over from when PA 581 ended at Carlisle Pike. There was no PA 581 and US 11 was its number plus a short PennDOT reference route between US 15 and I-83.

That's a pretty long reference route (2 miles). But OK, thanks for the history lesson.

[rickmastfan67]

PA 378 I think uses sequential numbering. There's a split E-W suffix there.

PA-28 is also sequential numbering.  If any of the state routes that still use sequential, PA-28 is the one route that should, no must, be converted to mileage due to the length of expressway it has.

[vdeane]

PA 378 I think uses sequential numbering. There's a split E-W suffix there.

PA-28 is also sequential numbering.  If any of the state routes that still use sequential, PA-28 is the one route that should, no must, be converted to mileage due to the length of expressway it has.

PA 378 and PA 581 are close enough in my mind.  PA 28 and US 6 really should be converted.

[74/171FAN]

PennDOT - District 8 News: Public Hearing Scheduled for the Eisenhower Drive Extension Project in Adams and York Counties

[Hot Rod Hootenanny]

PA 378 I think uses sequential numbering. There's a split E-W suffix there.

US 40 & US 422 just use letters.

[roadman65]

NCDOT uses mileage numbers on US Route freeways. I can see US 22 using mile based numbers on the Lehigh Valley Thruway and the freeway with US 322 and between Ebensburg and Duncansville.

[famartin]

NCDOT uses mileage numbers on US Route freeways. I can see US 22 using mile based numbers on the Lehigh Valley Thruway and the freeway with US 322 and between Ebensburg and Duncansville.

It seems like some states don't milepost non-interstates the same as interstates. For example, in Nevada, the only statewide mileposted routes are Interstates (at least when I was last there in 2016). US and state highways had mileposts which reset at county lines.  Interstates actually did too, but they were very small compared to the standard size state-wide mile markers. I've seen MD have an odd milepost set for US 1 in Harford County which doesn't follow the state mileage.

[74/171FAN]

NCDOT uses mileage numbers on US Route freeways. I can see US 22 using mile based numbers on the Lehigh Valley Thruway and the freeway with US 322 and between Ebensburg and Duncansville.

You could basically do the entire route.  Even the non-freeway portions have interchanges on it  (PA 56, PA 403, PA 26 in Huntingdon, PA 72, PA 934, etc.).

[storm2k]

NCDOT uses mileage numbers on US Route freeways. I can see US 22 using mile based numbers on the Lehigh Valley Thruway and the freeway with US 322 and between Ebensburg and Duncansville.

NJDOT does for pretty much all freeway segments that use exit numbering whether they're interstate, US route, or state route. They'll even just go with the on the books mileages in the case of a road like Route 18 which still starts at milepost 6 even though the plans to build south of 138 are basically dead and buried. Same for 21 even though the first 4ish miles of it are urban multilane arterial and it doesn't become freeway grade until the northern end of Newark.

[jemacedo9]

PA is inconsistent at numbering exits on non-interstates:

Numbered Sequential:  PA 28 (District 11), PA 29 (District 4), PA 309 (District 4), US 6 (District 4), PA 581 (District 8), PA 378 (District 5).
Numbered Milepost*:  US 220 Lock-Haven to Jersey Shore only (District 4), US 15 north of Williamsport (District 3)
*I believe both use theoretical I-99 mileposts
A-B lettering:  US 40/PA 43 Brownstown cloverleaf (District 12), US 119/US 422 cloverleaf (District 10)

All of the other non-interstates are unnumbered.
All of the PA Turnpike extensions are numbered.

So even within Districts and/or on the same road, there are inconsistencies.

[74/171FAN]

A-B lettering:  US 40/PA 43 Brownstown cloverleaf (District 12), US 119/US 422 cloverleaf (District 10)

This applies to the US 422/PA 28/PA 66 interchange in Kittanning as well.

[ekt8750]

PA is inconsistent at numbering exits on non-interstates:

Numbered Sequential:  PA 28 (District 11), PA 29 (District 4), PA 309 (District 4), US 6 (District 4), PA 581 (District 8), PA 378 (District 5).
Numbered Milepost*:  US 220 Lock-Haven to Jersey Shore only (District 4), US 15 north of Williamsport (District 3)
*I believe both use theoretical I-99 mileposts
A-B lettering:  US 40/PA 43 Brownstown cloverleaf (District 12), US 119/US 422 cloverleaf (District 10)

All of the other non-interstates are unnumbered.
All of the PA Turnpike extensions are numbered.

So even within Districts and/or on the same road, there are inconsistencies.

It doesn't help that mileposts on non-interstates reset at county lines in PA.

[roadman65]

PA is inconsistent at numbering exits on non-interstates:

Numbered Sequential:  PA 28 (District 11), PA 29 (District 4), PA 309 (District 4), US 6 (District 4), PA 581 (District 8), PA 378 (District 5).
Numbered Milepost*:  US 220 Lock-Haven to Jersey Shore only (District 4), US 15 north of Williamsport (District 3)
*I believe both use theoretical I-99 mileposts
A-B lettering:  US 40/PA 43 Brownstown cloverleaf (District 12), US 119/US 422 cloverleaf (District 10)

All of the other non-interstates are unnumbered.
All of the PA Turnpike extensions are numbered.

So even within Districts and/or on the same road, there are inconsistencies.

It doesn't help that mileposts on non-interstates reset at county lines in PA.

Math comes in handy to figure that one out. Caltrans does it on I-5.  The exit numbers and mileposts do not match, but math helped them determine where the interchange is in distance from its south end at Tijuana.