This article analyzes the time required to arrive at the spot for first aid in recent large-scale urban facilities with skyscrapers in preparation for super aged society of Japan. For the horizontal movement time, a formula was constructed by combining the "weighed Voronoi diagrams in the Manhattan distance". For the vertical movement time, a formula for a bus was applied to fire service elevators. The result on a model skyscraper with three types of building core showed that the travel time varies from 19 seconds to 4 minutes, which suggests the effect of the improvement in the operation of elevators.