Fires in dwellings are a serious public policy problem. Approximately 80 percent of all fire 44 worldwide are the result of fires that originate in a 45 occupancy. Since homes are historically the place where occupants are most vulnerable and have offered the least amount of fire 46 to their occupants, this should come as no surprise. Moreover, research has revealed that changes in materials used for furnishing, building materials and components, and construction methods have resulted in the potential for an increased level of hazard from a/an 47 dwelling fire.

The trainway typically serves as the means of egress for passengers in the event it becomes necessary to 48 a train. In an enclosed train/tunnel, the means of egress includes enclosed 49 and cross passageways that serve as points of safety. The maximum 50 between exits and cross passageways permitted by NFPA 130 is 762 m and 244 m, respectively.