What is the normal position of a spring switch where double track begins?

The normal position of a spring switch where double track begins is to align with the current of traffic. This ensures that trains can pass through the switch safely and efficiently without unnecessary interruptions. By positioning the switch in alignment with the traffic flow, it minimizes the risk of derailments or accidents caused by misaligned tracks, thereby improving overall operational safety and efficiency.

When the switch is aligned with the direction of travel, it allows for a smooth transition from single to double track, accommodating trains that are moving in the typical direction of operation. This practice is critical in maintaining the flow of rail traffic and ensuring that the system operates effectively.

In contrast, alternative positions such as inoperative, random orientation, or in the closed position would not facilitate the intended flow of train movements, potentially leading to complications or delays in rail service. The choice to line the switch with the current of traffic is thus an operational standard designed to promote safety and efficiency in rail operations.