Why are streetcrossings not always splitted? Problems using the Data!

Dear OSM Community.

I´m trying to use the exported OSM Data and there are issues with the street crossings because they are differently defined and "drawn" in OSM.

As an example what do I mean with different:

A) Let´s take the crossing "Goethestrasse" / "Dinghoferstrasse" in "Linz/Austria". Every street stops in the middle of the crossing at the Node. So there are actually 4 Streets getting connected. So the Node is the connection point between the 4 streets.

[img]https://i.imgur.com/QNgfsgP.png?1 [/img]

B) Compared to that...now let´s look at "Schillerstrasse" / "Starhembergstrasse" in Linz/Austria. Schillerstrasse is passing right through the crossing. And so does "Starhembergstrasse". BUT there is a Node (!) in the middle. This Node is not defined as crossing and so the crossing CAN'T be identified.

[img]https://i.imgur.com/fQ3Ix4j.png [/img]

Same with a T-junction. If 3 streets have a Node as connection = Perfect identification. 2 streets (1 street passing through the Node) = no identification.

I hope I make myself clear and I really need some advice how to "clean" the Data. I also would love to help OSM to develop... you guys a great!

Explanation of My project:

Help to develop a Street Import Mod for the Simulation Game Cities Skylines to improve traffic in my town by 1. Simulating the traffic accurately, 2. Applying road changes by trial/error, 3. Get in contact with the authorities.

Questions I´m asking in the CS Forum: https://steamcommunity.com/workshop/filedetails/discussion/1957515502/1744516325379783072/

1. We can´t change every OSM Street so we can get a "perfect" Data in OSM, right? Or can we?

2. How can we identify and re-write the Data so the Crossings are all identified 100%?

3. After we identified them: How does the algorithm look like, so we can fix the Data?

Or maybe we need to think more out of the box. Write a new Mode: "Every street crossing (even if there are different altitudes) must connect to a CS crossing." This would also connect the actual overpasses. But there are very few overpasses, right? Those can be corrected manually later on in the game fast.