I use one side of the retaining wall as it faces my back and side yard . I live right next to the rail road tracks . That other side of the retaining wall faces the rail road tracks where anyone who hopes the locked fence ( locked by the city ) , walks the rail road tracks , walks a trail , hobos , etc . can access this wall .

Question: What may be the reason why they hope the fence is locked ?
Answer: They want to feel safe .They want to make sure the cops ca n't get in .They want the hobos to feel safe .They want to make sure nobody gets out .