Unlike the Multiple Element Regression Analysis in Bentley Rail Track, the Geometry Connector in OpenRail Designer requires the number of fixed parameters to be equal to the number of free parameters. This makes the iterative process of obtaining the desired solution quite complex—particularly when working with reverse or compound curves.
Example 1: When creating a reverse curve consisting of two fixed-radius curves connected by spirals, achieving an accurate solution is significantly more challenging in OpenRail Designer than in Bentley Rail Track. Ideally, advancements in the newer software should simplify such tasks rather than increase the complexity compared to older versions.
Example 2: Similarly, when adjusting the geometry of a reverse or compound curve with intermediate spirals to improve lateral clearance from nearby structures, finding an optimal solution becomes difficult due to the constraints imposed by the Geometry Connector.