How to un-divide two one-way roads
Unfortunately, there is no easy way to merge two one-way roads back into a two-way road--which is why you should always give a lot of thought before dividing a road in the first place. And then think some more.
When you come across a road in your area that has been divided but shouldn't have been, you have some major map surgery ahead of you. Because of this high complexity in this process, it is recommended NOT to merge the two one-way roads UNLESS there are Update Requests related to the road caused by it being divided.
The process to un-divide a road (convert from two one-way roads to one two-way road) written below has been specifically designed to preserve the underlying address information embedded in the street segments. It is very important that you do not simply delete one of the two roads because that deletes the house address data on that part of the road. They would have to be looked up and manually added back to the new road.
The steps below show how to properly merge two one-way roads and preserve the underlying house numbers.
This is our example road segment. For the entire length of the road you need to:
1. Select the two segments to be merged and set them both to two-way.
2. Disconnect both segments from one side of the section being un-divided. It is best to disconnect alternate ends of each segment as shown.
3. Bring the two disconnected ends together in the middle (and realign the roads as necessary, removing the unnecessary segments as shown). You can remove the junction point you just created by selecting it and clicking the trash can icon or using the Delete key (Fn + Delete on Mac). Please note that the 2 aligned sections must have matching road information (name, type, direction, speed limit, elevation, and lock) or the junction point will not allow removal!
The following video was recorded by an editor merging two one-way roads so the addresses were preserved. This video follows the described steps above but may help seeing it happening in real time. Press the "enlarge button in the lower right corner to see it full screen.
{{#ev:youtube|6blRMtGwaYA}}
Un-Dividing Roads and Preserve HN - Video Reference
Un-Dividing Roads WME 2018 - Video Reference
After BOTH sides are merged into one, you need to re-align house number to the street so that it lines up with driveway/entrance of the building the bubble is over.
- With the street/road selected, click ‘Edit house numbers’.
- From the house number editing view, you need to select each house number one-by-one.
- With the house number selected, you see the dashed line is attached to a circle on the street.
- Select the circle and move it along the road closest to the entrance of the driveway to the building.
Also be sure to check the following:
- Remove all "orphaned" junctions.
- Change the direction of the preserved segments to two-way.
- Check/fix the connectivity of all the roads already connect to the side you kept.
- Connect (and set connectivity) of all the roads that used to be connected to the other side.
- Make sure all the new two-way segments are connected.
- Adjust the geometry to move the two-way road segments to the middle of the road.
Now repeat the entire process for the remaining segments matching the two opposite from each other.
It isn't difficult once you have gone through the process a couple of times.
Caveat: If you decide to be clever and edit the road properties of multiple segments at a time, first familiarize yourself with the known problems with mass-editing. It can be done -- but if you're not careful, you'll find that all the road segments have reverted to Streets...in Alabama...and any alternate road names are lost.