Variation on double crossover diamond (aka DDI) to be constructed

[johndoe]

http://www.athensnews.com/ohio/article-42432-plan-would-make-e-state-go-crossways.html
http://www.athensnews.com/ohio/article-42829-e-state_us-33-interchange-plan-selected.html

Just stumbled across this and thought some of you might enjoy it.  It should make for some interesting islands and signs!  I hope there is enough guidance for drivers (i.e. the northbound to westbound off-ramp movement not turning to eastbound lanes). 

[jakeroot]

Rather than make a left turn onto US 33 (N), why not just do a slip ramp to the right? That way, the left turn from US 33 (N) to E State Street (W) isn't handicapped. You could keep the free-flow with the loop ramp.

Wait, how do you get from E State Street (W) to US 33 (S)? Does the arrow just not exist on the diagram?

Also, the triple-carriageway setup reminds me of the DDI in Seclin, France.

[cl94]

Rather than make a left turn onto US 33 (N), why not just do a slip ramp to the right? That way, the left turn from US 33 (N) to E State Street (W) isn't handicapped. You could keep the free-flow with the loop ramp.

They'd have to buy a decent amount of property to keep within the standards. On such a busy road, they'd likely signalize the ramp termini. If this was the case, both signals would still have two phases. There will certainly be some interesting channelization, but keeping the loop ramp as is shown would not change the operation of the DDI.

[vtk]

Alternative 1: Diverging Parclo *3 or Half-Folded DDI

Very interesting indeed.

PS – US 33 is east-west in Ohio. At this location, geo north is sign west, and geo south is sign east.  Just "east" of here is a wrong way overlap with US 50 and SR 32 which is also Corridor D (or B or C maybe; I can't keep those letters straight).

*I can never remember which is which, of the A and B in parclo designations...

[2Co5_14]

*I can never remember which is which, of the A and B in parclo designations…

Parclo A: loop ramp in Advance of interchange
Parclo B: loop ramp Beyond interchange