Route analysis in complex buildings

Analysis of pedestrian circulation in buildings is usually performed in the early stages of the design process or later on with respect to a specific design problem such as fire safety. In both cases, the analysis relates more to wayfinding, i.e. search for a route on the basis of fundamental normative criteria. Wayfinding analysis in existing buildings is useful for the comparison between “rational” behaviour and actual usage but this comparison does little to explicate the observed structure of pedestrian circulation. In contrast to wayfinding, route analysis deals with the registration and assessment of actual patterns of pedestrian circulation in existing buildings. These patterns are represented topologically and geometrically. The geometric representation makes use of norms underlying building codes in order to reach an appropriate level of abstraction. Route representations are implemented on top of a building representation of relevant spatial and building elements. The building representation serves both as input and output for the route analysis. Input and output are largely automated, including production of the geometric route locally (i.e. within each space) and measurement of route distance and complexity. Use data are collected in an alphanumeric database and linked dynamically to the geometric and topological representation. Route analysis supports and refines other forms of post-occupancy evaluation by adding important dynamic aspects to activity allocation and compartmentalization