
Here is my aforementioned proposal.
A straight stretch of road.

Edit this segment so that it can be expanded from 7 to 13 or to narrow from 7 to 1, using the Ctrl key and mouse wheel, in step 1. Similar to how the height of the elevators is set in your Transport mode.
Crossroads.

That only the basic segment would remain (the first from the left in the picture). And that would be set similarly to balancers for conveyors. But instead of priority, exits/entrances from the intersection would be closed or opened.
For example:
obtaining a turn (see image) would be achieved by closing up and to the right and opening left and down,
T-crossing closing at the top and opening at the left, bottom and right,
full intersection by opening each side.
As the description suggests, there will be three states: off, open, and closed.
Entry or exit.

Replace these three segments with one with a width of 2 instead of 4. Soften the distinctive yellow pattern so that the arrows displayed on it are clearly visible. Same settings as the intersection segment. These values: entry, exit and both directions.
I know, it's a real wilderness. If it could be done this way and you want to try it, I'd be happy to. This modification would make the road network flexible. Demolition and construction of segments would be eliminated.
Let me know how you decide. Thanks.
