It is generally no problem if you have more than 1 trackrule. That was just an old untrue statement of RSC, which they never revoced.
The reason for the connecting problem artimrj is talking is: You may have different minimal radii in the trackrules and when you have laid a piece with 160m radius and want to extend it with a trackrule allowing only tracks beginning from 200 m radius you will fail.
It is strongly recommended to use separate trackrules for the main speeds in your route if you want to use superelevation.
In reality superelevation is dependent on the radius and the speed and the usage of the route (freight or passeneger (=highspeed) or mixed.
This can be achieved in railworks by variation of the value of <MaxSpeedTolerance d:type="sUInt32">110</MaxSpeedTolerance> (this is a good value for 100 km/h = 62 mph). As only one value is valid in a trackrule you have to use several trackrules.
In my route I use 16 trackrules for 8 different speeds (for left and right switches). No problem at all and you fly through the curves as you will always have the maximum cant in curves with minimal radius! No commercial route uses this feature until now. You may experience this feeling in the recently published freeware route "Projekt Freiberg(Sachs)"
http://rail-sim.de/railsimnew/index.php/downloadscat/viewdownload/41-strecken/1896-projekt-freiberg-sachs which is made by one of our members on rail-sim.de (rolling stock is very uncommon for you in america, so just create a freeroam to use).
General rules for using several trackrules and superelevation:
- Use only one trackrule withing one curve, otherwise you will get a bump.
- superelevation only in curves with an easement curve (clothoid) on both ends and between different radii
- separate tracks with different pieces of trackrules by cutting and joining (there must be a red triangle), otherwise the loco may have problems with reading the right trackspeed.
Kris