[pierreh]

Brian was quite correct in mentioning that I could have solved the issue of the railway line crossing the highway interchange by using ESURE. Since the new layout, with the curtailed railway line and the new station at the outskirt of the commercial zone, didn't seem to work well - the railway station and the shortened railway line had no traffic - I decided to implement an ESURE setup, and to restore the tracks going to the city's main railway station.

This is documented with the following pictures. In the first picture we can see that the new railway station has been removed. However, due to the many tall buildings we don't really see the ESURE setup:



The second picture shows the zone view of the ESURE setup. This includes, from left to right, a surface rail to underground rail transition, an ESURE piece, the short section of subway below the lanes of the highway interchange, the second ESURE piece, and the other transition bringing the u-railway to the surface again; the u-rail sections were kept deliberately short:



The third picture shows the traffic on the railway line, with the short section of subway. (The other subway path on the upper part of the picture goes to the main railway station where Sims board the trains that pass thru the ESURE link):



I am quite pleased with that implementation, which gives me some ideas for other cases.