Modifiers matching safety:

• public,
• personal,
• internal,
• industrial,
• passive,
• electrical,
• systemic,
• pedestrian,
• occupational,
• interior,
• structural,
• general,
• marine,
• active,

Simple categories matching pedestrian:

• safety,
• area,
• path,
• facility,
• plaza,
• space,
• usage,
• flow,
• signal,
• activity,
• passage,
• access,
• location,
• cover,
• formation,
• improvement,
• hazard,
• object,
• issue,
• control,
• feature,
• traffic,
• measure,
• medium,
• experience,
• pathway,
• walkway,
• route,
• event,
• furniture,
• project,
• protection,
• use,
• surface,
• covering,
• furnishing,