PA Turnpike AET
A concept for redesigning the Pennsylvania Turnpike in the wake of conversion to AET. Similar to vdeane's AET Thruway concepts.
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Exit 48 (Allegheny Valley)
Exit 48 (Allegheny Valley)
How come the Turnpike never bothered to build better connections to its freeways?
This interchange uses a low land footprint wile also keeping some existing infrastructure, as well as straightening out Front St. (now designated as an extension of PA 128). To keep the footprint low, the NB 28-EB 76 ramp had to be consolidated with the SB 28-EB 76 loop.
Exit 57 (Pittsburgh)
Exit 57 (Pittsburgh)
This was redesigned in order to have high-speed Interstate-to-Interstate traffic. I also reduced potential weaving by adding collector-distributors along WB 376 at its terminus. Since All-Electronic Tolling will be essentially invisible, I do envision more people will be using the Turnpike.
Exit 67 (Irwin)
Exit 67 (Irwin)
No change due to development.
Exit 75 (New Stanton)
Exit 75 (New Stanton)
This interchange may very well be the most complex of all of these interchanges. Instead of bouncing off each other at loop ramps, I instead made the PA 66 expressway have an exit for the US 119 expressway, as well as collector-distributors. This gives 66 a direct connection to the Turnpike, and keeps 70 from passing over itself.
With this interchange, the flow of Interstate-to-Interstate is left completely uninterrupted, and 119 and 66 have far higher traffic flow.
Exit 113 (Johnstown)
Exit 113 (Johnstown)
I am not replacing the current exit at Somerset, but the amount of indirect connections can be ridiculous at times. Therefore, a new exit for the 219 expressway (the Johnstown exit) will be sufficient, using a double-trumpet interchange so as to keep the rest areas intact .
When two exits are as close together as these two are, there will be no mainline gantries, thus making flow from Exits 113 and 110 completely free.
Exit 146 (Bedford)
Exit 146 (Bedford)
Similar to the Johnstown exit, the Bedford exit uses double-three-ways instead of a simple four-way, this time as tri-stacks. Access from 220/99 to Bus. 220 is preserved through the former trumpet interchange.
Exit 161 (Breezewood)
Exit 161 (Breezewood)
Breezewood has been a thorn in the side of roadgeeks since it first came into existence. Interstates just should not have at-grade intersections, period. However, there is an easy fix under AET.
This incorporates flyovers and cloverleaf loops as New Stanton did, but they flow more neatly into the Turnpike instead of taking a hard left. The old alignment of 70 is designated as BS 70, and can become the third business Interstate highway in the state (a full-fledged Interstate spur designation would be too short).
Exit 226 (Carlisle)
Exit 226 (Carlisle)
Yet another indirect connection to be fixed. This one preserves some direct connections between the Turnpike and 11, but also makes its connection to 81 far more stable. Due to the warehouse in the way, the exit from NB 81 to EB 76 had to be consolidated with the loop from SB 81 to EB 76. Since less traffic will be exiting onto 11, the parclo has been reduced to a simple diamond.
Exit 236 (Gettysburg)
Exit 236 (Gettysburg)
No change due to development.
Exit 242 (Harrisburg West)
Exit 242 (Harrisburg West)
No change due to development.
Exit 247 (Harrisburg East)
Exit 247 (Harrisburg East)
I-283 and Route 283 should have been a single continuous route from the start, so this fix simply combines their right-of-way into one, making the former cloverleaf into a DDI, and giving Lancaster an Interstate Route to access it.
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