To limit the probability that certain corridors will be of insufficient width to permit efficient egress in an emergency situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that certain corridors will be of insufficient width to permit the efficient circulation of persons travelling in opposite directions in a non-emergency situation, which could lead to persons bumping or hitting each other, which could lead to harm to persons.
To supersede and increase the minimum width of exit facilities specified in Sentence 9.9.3.2.(1).