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.