• No roundabouts - Junction boxes do not support roundabouts. Do not create junction boxes over roundabouts.
• Max size - The size of a junction box cannot exceed 1 kilometer. This is a linear 1 km limit north-south or east-west. If you draw an imaginary 1 km² box around the junction box, if the junction box pokes out at any point, then it's too big.
• Two junction nodes minimum - A junction box must include at least two junction nodes. Two junction nodes within the junction box must be connected by a segment. A junction box with only one junction node cannot be saved.
• One connection per pair - A junction box must have only one connection for every entry/exit pair. If there are multiple routes available over the segments within the junction box between an entry/exit pair, the box is invalid and cannot be saved.
• Sixteen paths max - No more than 16 controllable entry/exit paths can pass through a single node within a junction box. A save error stating "The highlighted node cannot have more than 16 connections" occurs if a node has more than 16 connections. Adding segments or junction nodes to an intersection to workaround the "one connection for every entry/exit pair" and "no more than 16 connections per node" limitations is not recommended. If such a workaround is required please consult with your country or regional coordinator.
• No overlapping - A junction node cannot be included in multiple junction boxes.

Fredo-p wrote:That's an easy one.

Please contact your local SM for questions, concerns and any edits related to the JB

PesachZ wrote: Contact the last editor or creator of the JB, it is listed on the left when the JB is selected. (Looks similar to an area place)

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kentsmith9 wrote:I can do the formatting after PesachZ completes that section.

jr1982jr wrote:Nice job on the writeup. I have to say that this is the most complex article I have read here though. I like the content!

For everyone but Carl, since he was the one that sent me here, there is a JB in my area that I was studying today and I had questions (the JB in question so happens to be the example in the "Effects In Editor" section). I would not have found the information about the SB section not having an associated letter if that had not been one of my questions. I did not see the R5 limit until my 4th read through the document. I hate to ask why the limit rather than the traditional limit of the highest link in the box (which would also be the limit on placing the JB in the first place). I still think some of our senior editor level locked items go unmanaged because that group is so small. I know I won't ask outside my usual group of 5+'s for an unlock (or change) like this without an emergency.

My final comment really doesn't pertain, I guess, but I was concerned that there was not enough about situations to NOT use the JB. Since it will be R5+, that should be no issue. I can tell you though, it'll be a cold day in hell before I purposely lock a street to 5+, that isn't already locked before I start work, for anything but someone seriously screwing with the content and I still believe that's a situation better handled administratively rather than via a lock. I do think this limit will seriously decrease the knowledge spread about the application of the JBs thus limiting their implementation in places they really could provide help to a tough situation. The only reason my original problem ended up in this writeup is because I was asking for help in GHO and Carl happened along at the right time. We are compartmentalizing ourselves with GHO and it could have easily gone a very different way that day.

alexs001 wrote:

The size of a Junction box cannot exceed 1 kilometer.

Is this a linear distance limit for one side, or corner-to-corner? Or is it an area limitation? ie 1 sq.km

KuniaKid wrote:

Fredo-p wrote:That's an easy one.

Please contact your local SM for questions, concerns and any edits related to the JB

What if said SM doesn't have the ability to use or edit JB's. (me!)