Balance change for stairs — Steam Revolution: The Age of Rail Steam update #47444

Previously, using a chain signal to select open platforms performed worse than a simple round-robin setup, because round robin didn't wait to determine if a platform was open and so had less waiting time before sending trains. The chain signal could theoretically perform better if the optimal train distribution was not uniform, but the different platforms were close enough in loading times that it didn't matter and the chain signal would still send the trains round robin, but with a larger delay.Stairs now cause workers to slow down more to penalize distant platforms and make round-robin not always the optimal signal choice when entering a station. My hope is that this will lead to more interesting and varied station designs.