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Retain Intersection Settings

Makes a much harder effort to retain your intersection settings.

Many operations in vanilla IS are destructive to your intersection settings (lane connection rules, traffic signs and traffic lights). This mod tries to protect your settings in many such cases.
For example the replace-road tool will keep your settings if the amount of lanes doesn't change.
Reversing two-way roads is no longer possible, because that also had the effect of erasing some of your intersection settings without any actual benefit.
This mod also brings back the feature of reversing one-way roads when using the replace tool on them with the same kind of road. This is useful for changing two-way roads with one-way roads and then immediately reversing them by clicking again, in case you were not happy with the orientation that you got.