ESRI has announced ArcGIS Network Analyst is now available. This new extension provides network-based spatial analysis including routing, travel directions, closest facility, and service area analysis. The Network Analyst functionality is available for the ArcGIS Desktop (ArcView, ArcEditor, and ArcInfo), ArcGIS Engine, and ArcGIS Server. ArcGIS Network Analyst will enable utilities, telecommunications companies, and pipeline operators to meet demanding logistics issues.
With ArcGIS Network Analyst, users can dynamically model realistic network conditions, including turn restrictions, speed limits, height restrictions, and traffic conditions, at different times of the day. Using a sophisticated network data model, users can easily build networks from their GIS data. The new Network Data Set in ArcGIS 9.1 incorporates an advanced connectivity model that can represent complex scenarios like multimodal transportation networks. This will enable users to efficiently model multiple forms of transportation across a single data set by using points of coincidence, such as rail stations or bus stops, that form the linkages between several different forms of transportation.