RHW-8S and D1 DRI. Let's do the Timewarp, again!

[Henry Crun 75]

Hi all,

For the title, I reference the song from The Rocky Horror Picture Show (just in case) in that drawing this out, the RHW does the "jump to the left". This might be a known problem but a (very) quick search here and on SC4D didn't throw up anything. That might be search terms, though.

I'm drawing these patterns, flipped as I'm drawing on LHD RHW.

D1 Outside. A stretch of RHW-8S. The RRW and road tiles are to show where it is when I start

So, I end up with the RHW one tile to the left of where I started and have to bulldoze the redundant tiles to the right.

E1 Outside. Not repeating the process but just to show the same happens here.

What does the panel think? Is this unfortunate but expected behaviour? The A1/B1 ramps work fine and the RHW is exactly where it should be. In the 3rd step above, if I drag south instead of east, the RHW below the ramp ibecomes RHW-10S and stays in place.

Thanks for looking

--

Dave

[Lucario Boricua 7,063]

The tricky part about this ramp is that RHW-8S is that, with a single lane drop, it changes in cell footprint (2 cells to 1 cell, into RHW-6S). D1 and E1 ramps make the RHW-8S stem (the upstream side) drop 1 lane, leaving the mainline branch as a RHW-6S. It's working as intended, but you have to plan it thinking about the narrower mainline branch (RHW-6S). You do have the drag pattern correct at least!

[Henry Crun 75]

Thanks for confirming, @Lucario Boricua. It's a big help knowing you've done it right!  I fully understand the mechanics now. As you say, it needs thought and planning. I am running the RHW with no tile gap between the carriageways as this is the norm in the UK. We only divide the carriageways when we absolutely need to!  I was using RHW-6C/8C and that worked fairly well.

@rsc204 recommended 6S/8S for the flexibility, which I do get. I can see a lot of 6C -> 6S -> Ramp -> 6S -> 6C transitions in my plans! 

Thanks,

-- 

Dave