How does a train fulfill a Form D line 2 in one direction?

To fulfill a Form D line 2 in one direction, a train must clear the limits of the line 2 authority. Form D authorities are used to manage train movements within specific limits, and line 2 specifically indicates that the train is allowed to operate in a designated section of the track under certain conditions. When a train fulfills these requirements, it means that it has successfully traveled beyond the boundaries of the authority it was granted, thereby effectively concluding its permission to operate within that specific area.

By clearing the limits of line 2 authority, the train is essentially confirming that it has complied with the conditions set forth in the Form D, ensuring safety and operational integrity. This clarity is crucial in railroad operations, as it helps maintain the proper flow of train movements and keeps track sections clear for other trains that may be waiting to enter or operate within those limits.