Final answer:
The subject of this question is Law and it pertains to violations at railroad-highway grade crossings.
Step-by-step explanation:
The subject of this question is Law. The question is referring to violations that include breaking federal, state, or local laws or regulations related to offenses at railroad-highway grade crossings. These violations can involve actions that are against the law, such as illegal crossing of a railroad track, ignoring traffic signals at railroad crossings, or trespassing on railway property. It is important to abide by these laws and regulations to ensure safety at railroad-highway grade crossings.