Developments in electronic computing have in recent years seen the emergence of a variety of road and pedestrian micro simulation program systems, many of which make use of traditional non-dynamic assignment methods. Almost ten years ago, the author's company was asked to provide dynamic routing within London Underground's Station Congestion Model for the purpose of modelling station emergency evacuation scenarios. This paper explains how this has been achieved through the concept of the Capacity Restraint Vine, by defining the theoretical and practical principles behind it, touching on a) How it can be used, b) How it has been used and refined over the last ten years and c) How it has affected the way further developments are currently being made in the areas of pedestrian modelling, making people visible to the modeller and enable people in the model to take action according to what they can see and understand. Although only used for pedestrian modelling in Pedroute and Paxport, the Paper argues that the methodology is general enough to encompass modelling all modes of transport. Examples of current use of applications: Heathrow and Gatwick passenger Terminals, Waterloo and St. Pancras Stations, Tynecastle stadium, Shopping Centres etc., and soon it will be possible to visualise people moving, in complete models as mentioned, in 3D during a simulation, and subsequently in VR.
Abstract