Historically, blind rehabilitation clinicians have relied upon subjective checklists and clinical assessments to document the capacity of individuals to perform various tasks, including mobility, and to assess changes in activity gained by attending Blind Rehabilitation. The continued development and implementation of outcomes instruments represents a major achievement in the coordination and standardization of measuring functional outcomes. This study highlights a unique, objective method for assessing mobility and activity in visually impaired individuals using a combination of GPS (Global Positioning Satellites), GIS (Geographic Information Systems), and accelerometer technologies. The use of these technologies facilitate a highly objective and reliable measurement of both indoor and outdoor mobility and travel patterns. The GPS/GIS and accelerometer data collected in this study was gathered as a mechanism to assess the reliability of self-reported travel behaviors of four research subjects. The purpose for this study was to test the methodology and procedures for future use in a large-scale research study. Consequently, the sample size was intentionally small (N = 4). The resultant GPS/GIS and accelerometer data accumulated in this study included: number of trips each participant made on each of the travel days, the level of activity on each travel day, the distance, maximum speed, and average speed per trip and documentation of each participant's activity space. The GPS second-by-second trace data, once received, was converted into GIS-compatible formats and then reviewed for potentially bad or poor data points. A program was subsequently run on the GPS data stream to identify potential trip ends based on time intervals between consecutively logged points. Additionally, when the activity data was downloaded, it was merged with the GPS data based on time and date. This allowed for the evaluation of activity levels captured concurrently with GPS data as well as to identify activity occurring without GPS data. Based on the findings from this study it is evident that the use of GPS/GIS and accelerometer technologies is an effective procedure to both quantify and depict travel behaviors and activity levels associated with visually impaired adults. Based on the results of this preliminary study, a 3 year regional study quantifying the impact of Blind Rehabilitation on travel and physical activity has been funded and is in progress.