Final answer:
To safely cross parallel railroad tracks, one should move far away enough to cross at a minimum angle of 90 degrees for quick crossing and optimal visibility.
Step-by-step explanation:
When crossing railroad tracks that run parallel to your course, it is recommended to move far enough away from the tracks to cross at an angle of at least 90 degrees. This safety practice ensures a quick and efficient crossing, minimizing the time spent on the tracks and therefore reducing the risk of an accident with a train. Additionally, a 90-degree angle allows for the best visibility in both directions along the tracks, giving you a clear view of any oncoming trains.