The only place where gauge widening is really managed is Light Rail Manufacturing. When creating rail it is possible to use a widening table. It male sense because of small radius used in such design. Without this command it is not really easy to get it. Create Rail in 3D command doesn't provide the ability to use a widening table and is the easiest way to get the true 3D position of the rails. So the other way is to manage it using Roadway Designer. There you can use the Curve Widening command to add extra offset to the rails. But it is only horizontal offset. So you come back to the way of getting the true 3D rail position using templates. To do this you need 2 components (one for left curves and one for right curves) and display rules to use one or the other. You must set rail points using angle/distance constraint. Anyway no way to get the exact 3D location. remaining error will be Z1.4mm,H2mm for 180mm cant, Z0.2mm,H0.0mm for 100mm cant (gauge 1.435). RR_LeftCurve is set by angle distance using LR_LeftCant and RCant The distance could be set to "equal to distance between 2 points". So you can apply the widening to construction points used to measure the distance. The example below is over the cant limit used in France (160mm). For 160mm the error in Z is "just" 1mm Another solution is to combine both method (create rail in 3D and template). Use the rail in 3D as point control to get the true rail position (no widening) and add another point with the widening created by angle distance from the previous and distance=distance between 2 construction points, as above.
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