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SimCity 4 Devotion Custom Content Showcase => NAM How-Tos and Tutorials => Network Addon Mod (NAM) => RealHighway Interchange Guide => Topic started by: Haljackey on November 26, 2011, 02:26:19 PM

Title: Basketweave Interchanges
Post by: Haljackey on November 26, 2011, 02:26:19 PM
Section 17: Basketweave Interchanges
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2Fa%2Fa6%2FThe_Basketweave.svg%2F350px-The_Basketweave.svg.png&hash=628d5228f598be9ff7ad04cfd3e738169252f2a3)

A basketweave interchange is commonly found on highways using a collector/express system or long collector/distributor lanes. In a basketweave, one highway is able to interchange with itself, allowing traffic traveling in the same direction to switch between carriageways through the use of flyover/under ramps created between two carriageways without causing weaving. These interchanges usually involve left exits and entry for the outer carriageway (right in left-hand drive) but can be configured to meet on the right.

These interchange designs are very useful for interchanging a multi-RHW or two RHWs running parallel to one-another for a short distance.

17.1: Basic Basketweave Interchange (http://sc4devotion.com/forums/index.php?topic=14079.msg426466#msg426466)

Back to the Table of Contents (http://sc4devotion.com/forums/index.php?topic=14057.0)
Title: Re: Basketweave Interchanges
Post by: Haljackey on June 19, 2012, 11:22:37 AM
Section 17.1: Basic Basketweave Interchange (Created by Haljackey)

I've been contemplating for a long time as to how to create a Basketweave Interchange (without weaving) that's simple enough to make a easy-to-follow guide. I believe I have found that design.

For simplicity's sake, I am using a dual RHW-4 setup (Multi-RHW-4) all with one tile gaps. This should help minimize confusion as to what is going where.




To begin, drag your RHW-4s like so.
-You don't need to have a 1-tile gap between your inner/express RHWs, but you will need at least a 1 tile gap between the inner/express and the outer/collector lanes for this design.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FYWB64.jpg&hash=84e67794972aec3e1c260633160f21e9ece370ea)

Create a pair of RHW-4 type "A" ramps on the inner RHW-4s using the puzzle piece drag method.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FHkxRX.jpg&hash=1894b17a495658ddeefad5d59a11fe32ab920e02)

Then, extend your MIS ramps by one tile and drag toward your outer RHW-4s. This will create RHW-4 type "A" left ramps using the puzzle piece drag method.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FuglUX.jpg&hash=030dbd0f993617bc4512a0055b289cb800d66718)

Just below these new ramps on the outer RHW-4s, create a pair of RHW-4 type "B" ramps (again using the puzzle piece drag method) like so:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FjkWqb.jpg&hash=23a25d57862b1dae0130ba67add982184cc73d83)

Just above the left exit ramps you made, plop a pair of ground to elevated RHW-4 transitions. Drag the MIS that you created to go on the diagonal where these pieces end. Plop another pair of ground to elevated RHW-4 transitions on the other side.
-It may help to extend your diagonal MIS a little farther to minimize the chance of overrides. You can delete some of your inner RHW-4s to achieve this.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FLlLPg.jpg&hash=18508d0a9d681348fc4050797abd0bf0dd0b974a)

Plop El-RHW-4 over diagonal MIS pieces over the ramps below to complete the overpasses and ensure a working connection.
-The MIS on the inner sides of the overpasses may revert to RHW-2 at this point. Don't fret, that's ok if it happens to you!
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FYmwrI.jpg&hash=2ef8002aec717593fb318b7bd504c1b3d4ac593c)

Demolish the MIS/RHW-2 pieces that are in the way of your inner RHW-4s and re-drag them. Then create a pair of RHW-4 type "B" ramps to connect your ramps to your inner RHW-4s.
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FISDug.jpg&hash=b4c4f3e7169c920d47737f7b451f5c2718974202)

Congratulations! You've created a basketweave interchange! Here's what it looks like zoomed out:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FoM8lO.jpg&hash=69366744c9c7568e455e841e1699c100bd87f9cf)




Anyways, I hope you found this guide useful. Basketweaves are limited in their use since they don't actually interchange with any other routes but they serve their purpose well. These are must-have junctions for any player who wants to recreate a collector-express system in SC4.

Enjoy!
-Ryan (Haljackey)
Title: Re: Basketweave Interchanges
Post by: wschmrdr on June 28, 2012, 05:42:36 AM
Ryan, first time poster, but I had a thought on this one to make it a little more similar to the basketweave interchange that exists in Toronto ( https://maps.google.com/maps?q=basketweave+interchange&hl=en&ll=43.718574,-79.498787&spn=0.009848,0.022724&client=ubuntu&channel=fs&oe=utf-8&t=k&z=16 ):

What if you were to use 10S with D2/E2 exits for the "express" route, and then 8S with the D2 exit on the "local" route? Perhaps raise the RHW-4 lanes to elevated (with a gap of maybe 1 or 2 tiles between this ramp and each main road), run the other ramp diagonally underneath, and then bring down to ground to re-join with the other road?

I think one of the biggest limiting factors in creating a good looking interchange is the lack of variety in left exits (or right exits if you drive on the left; being from the Americas I'm used to driving on the right), and this is why I picked 8S because there is a D2 interchange that effectively splits the road.

I'm sorry that I don't have any screen recording software, not to mention my computer is running Ubuntu so the output from WINE isn't all that good. I suppose I could just use print screen; I'll consider it over the weekend.
Title: Re: Basketweave Interchanges
Post by: Haljackey on June 28, 2012, 09:00:39 AM
Oh yes I am aware of that junction... that's the iconic basketweave :P

I have yet to find a 'simple' way to make it so a guide can be formulated. Your idea seems like a good way to execute such a design though, but is too complex for a guide however.

I made something like it back in the RHW 4.0 days. Have a look: http://www.majhost.com/gallery/Haljackey/GTR/22.jpg

As for the lack of left exits, I actually don't mind too much myself. I would much rather have exits on the right and then have the ramp 'fly over' or under the collector lanes or maybe use a braided interchange.
Title: Re: Basketweave Interchanges
Post by: wschmrdr on June 28, 2012, 07:37:59 PM
I can understand that. I'm in New York State, where we have plenty of instances of "left exits", most of which are for T interchanges (example being along I-481 with the southern part of I-81 and also the junction with I-690), but also when you need your mainline to curve to the right, like with I-90 east to I-87 south in Albany NY, and when you have two parallel interstates, although not in a true weave, see I-81/I-690.

I'll leave the left exit discussion elsewhere, as we probably want to keep basketweaves here. I really like the design on your 4.0 weave, and is actually not all that dissimilar from the concept I had of a diagonal RHW under a flyover RHW4. Hopefully I find some other good spots on this board to discuss interchanges and highways, as I really do like them, and would love to try to recreate some real ones with SC4 and the mods.
Title: Re: Basketweave Interchanges
Post by: shinkaede on June 28, 2012, 11:52:47 PM
I've played SC4 for quite a while but haven't shared any of my screenshots since they are nowhere near as good as everyone else's creations here -_-.  However keeping on topic, here's a shot of a basketweave I made recently.  I made it more for the challenge and aesthetics over functionality...though it does have some usage but my sims still love their heavy rail transit.

(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FPDHBw.jpg%3F1&hash=7e10b69d898b730c38f3ea8ba35d017d6f0261f3)