Potential Bus Ridership—Fairfax Connector Acquisition
of the Centreville/Chantilly Market

This map provides a look at how Fairfax Connector used a network-based spatial analysis approach to find potential transit customers. As part of a planned acquisition of a new market area, Fairfax Connector used vehicle point-of-origin data and existing transit GIS data to conduct a service area analysis of bus stops to determine the number of potential riders within a reasonable walking distance. Transit officials used the results of this analysis to make better informed decisions and help justify the planned acquisition.

This map illustrates the results of a vehicle point-of-origin analysis conducted by Fairfax County Department of Transportation in November 2004 at the Vienna Metro parking facility. The map focuses on the Chantilly and Centreville areas of Fairfax County. These areas receive peak hour bus service to Vienna Metro on 13 Metrobus routes called the 12s and 20s. The black dots represent vehicle point of origin and are plotted on this map to show proximity to both current Metrobus routes and Metrobus stops. The light color shading shows point of origin of all commuters driving to Vienna Metro who reside within one-quarter mile of a bus stop; the darker color shading shows commuters who reside within one-half mile of a bus stop.

ArcView 9.1 was used, along with the ArcGIS Network Analyst extension, to perform the data development and analysis. Adobe Illustrator was used for the final map production.