Is your feature request related to a problem? Please describe.
When a train moves from a section of track with a higher speed limit to a section of track with a lower speed limit, it only decelerates after it has entered the section of track with the lower speed limit. For example, if I have a section of straight track with a 120 km/h speed limit followed by a curve with a 60 km/h speed limit, the train will still be travelling at 120 km/h when it enters the curve. This is not realistic because, in real life, the train would immediately derail upon entering the curve that quickly.

Describe the solution you'd like
The train should begin decelerating before it enters the section of track with the lower speed limit so that it is already travelling at the lower speed when it enters the section of track with the lower speed limit.