"Perceived", or subjective safety refers to the level of comfort of users. For example, traffic signals are perceived as safe, yet under some circumstances, they can increase traffic crashes at an intersection. Traffic roundabouts have a generally favorable safety record, yet often make drivers nervous.

चाचणी प्रयोगशाळा
Perceived safety
Normative safety
Risks आणि responses प्रतिसाद/प्रतिक्रीया