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BROWSE SATURN MANUAL

SATURN is a suite of flexible network analysis programs developed at the Institute for Transport Studies, University of Leeds and distributed by WS Atkins of Epsom since 1981. It has 6 basic functions:

1. As a combined traffic simulation and assignment model for the analysis of road-investment schemes ranging from traffic management schemes over relatively localised networks (typically of the order of 100 to 200 nodes) through to major infrastructure improvements where models with over 1000 junctions are not infrequent;
2. As a “conventional” traffic assignment model for the analysis of much larger networks (e.g., up to 6000 links in the standard PC version, 37500 in the largest)
3. As a simulation model of individual junctions;
4. As a network editor, data base and analysis system;
5. As a matrix manipulation package for the production of, e.g., trip matrices.
6. As a trip matrix demand model covering the basic elements of trip distribution, modal split etc.
   

As a combined simulation and assignment model - its original function - SATURN is most suitable for the analysis of relatively minor network changes such as the introduction of one-way streets, changes to junction controls, bus-only streets, etc. (which can be loosely categorised as “traffic management measures”) and whose evaluation requires a detailed analysis of traffic behaviour at junctions.

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