Where should cars be placed if they are left adjacent to a public crossing at grade?

The correct choice is to place cars as far from the crossing as conditions permit. This practice is essential for maintaining the safety of both rail operations and vehicular traffic. By keeping vehicles at a safe distance from a public grade crossing, it minimizes the potential for accidents and obstructs the visibility of approaching trains. Additionally, this helps ensure that train crews can see the crossing clearly and that drivers have adequate sightlines to look out for oncoming trains.

This protocol not only aids in preventing collisions but also contributes to the efficient operation of train schedules by allowing for clearer passage at crossings. The recommendation to maximize the distance is typically an established safety measure to mitigate risks associated with train operations near public roadways.

Other options might suggest either positioning the cars too close to the tracks or in spots that could obstruct visibility for both motorists and train operators, which could lead to dangerous situations. The emphasis on using the most secure placement supports a safer crossing environment and reinforces compliance with operational safety regulations.