Share and learn how-to tips, workflows, and general knowledge articles about rail topics.
Contributed by:
When configuring the design speed for a rail alignment, it is important to consider the cant calculation algorithm and how it retrieves this speed. The cant calculation algorithm determines the highest design speed value between the start and end of each curve, which may result in unexpected cant calculation results if not done properly.
It can be easy to spot issues when the speed transition occurs in the middle of the curve. However, when the design speed station coincides with the curve start or end station, the cant calculation algorithm may also consider the previous or next design speed value, leading to inaccuracies.
To ensure accurate and reliable cant calculations, it is recommended to avoid placing design speed changes directly on the curve element start or end stations. Even a small offset will suffice to ensure that only the intended speed is used during cant calculations. By following this best practice, you can achieve consistent and precise cant result in your rail alignment designs.
