you said there should be markings for merges exits and slopes but there's nothing there no matter how flat it gets

@SimoG Cheers. That, together with some videos from YUMBLtv and some trial and error, helped me on the way. I like dual carrageway roads a lot better than those single ones. And CSUR is overkill since the arrival of Node Controller and Intersection Marking.

@BraccX I have this but it's not update with the actual version of Highways and does not include the use of Intersection Marking Tool and Node Controller mods which did not exist at the time of realization. Instead, now, I recommend you to use them, so as to get around some limitations of CSL:

https://www.youtube.com/watch?v=9bID02qypgc

Is there a tutorial available? I'm having difficulties getting smooth slopes for example.

@ DragonOfMercy Thanks. I will check for sure. Could you take a screenshot of when the problem arises? So I can reproduce it and test in the same context.
PS. can I suggest you to use Network Extension 2 mod? because the road color has not been updated for some time and I know that with the roads from the workshop it presents problems, even if not always.

You can see it here : https://i.imgur.com/rLi9cFr.jpeg

Hi, I have a texture bug while using Road Color Changer++, I have made my road a little bit darker than the original (80,80,80), the texture used for growing lane, for example, 2 to 3 with exit, display a gradient on the road. Could you please check that !

I thought I had solved the problem, but evidently I have not yet understood how to set it... I will investigate again :-)

Your concrete over wall collection is superb, I am using it throughout my city.

One slight annoyance, is there a left hand drive version of the roads? The auto-generated signs face the wrong way when using LHD