NCIDQ IDPX Practice Exam 2026 – Complete Interior Design Test Prep

The minimum distance between exits within a space is determined by safety regulations that account for how quickly and efficiently occupants can evacuate in case of an emergency. Maintaining a safe distance between exits helps ensure that if one exit becomes blocked due to an emergency, occupants have a secondary exit that is sufficiently far away to provide an alternative means of escape.

The correct option states that the distance should be one-half the diagonal distance of the room area. This is rooted in the principles of life safety design, which emphasizes the need for well-distributed exit paths to minimize the risk of congestion during an emergency evacuation. A spacing of one-half the diagonal distance strikes a balance between accessibility and safety, allowing for multiple egress points without requiring excessively long travel distances to reach an exit point.

The other options present distances that either do not align with established safety codes or create undue risk. Distances that are either less than one-half the diagonal distance would not provide adequate separation in case one exit is obstructed, while those significantly exceeding the recommended distance may lead to inefficient escape routes that compromise overall safety measures.