I'm trying to optimize my road system a bit, mostly converting regular small roads into one-way roads. But the only way I can see to do that is to remove the old road entirely and build a new one. I can't seem to just build over the old one.
I can understand that limitation in cases where the new road type is larger, but it should be possible to upgrade to roads with the same size without tearing down the old road manually.
Is there an easier way to convert or upgrade roads, or do I have to manually remove the existing road every time?
Best Answer
In the case of upgrading the size of the road, you can use the "!" button next to your road shape tools (straight, curved, etc).
Unfortunately, this only works on size, at least for now.
Due to the fact that you can only decide the direction of a one way road by dragging it, you still have to delete and rebuild a road you want to change to one way. You can also edit the direction of one way roads with this tool, by right-clicking on the one you want to invert.Note also that this WILL bulldoze buildings that were in the way of the size expansion, and that you'll have to manually move plopped buildings placed along the side of the road you're upgrading or you'll get a "space already occupied" error.
Edit: in this ever changing world in which we're living, CO has added official support for one to two way road conversions and reversing the direction of a one way road. From the 1.0.6b patch notes: road upgrade tool now works between two-way and one-way roads and right mouse-button changes direction of one-way roads
From: http://steamcommunity.com/app/255710/discussions/0/611701360821801977/