One concern with the development of any model that is based on the perceptions of individuals is that these perceptions may differ depending on the geographic region. If this is true, then separate models must be developed for the various regions where such differences occur. Thus prior to any model development in this study, the ratings from the three survey cities (Olympia, WA; Austin, TX; and Chapel Hill, NC) were compared. The distribution of bicyclists by type (experienced commuter vs. experienced recreational vs. casual recreational) was similar in the three regions. As shown in figure 13, there were virtually no differences between locations in the comfort level ratings of any of the variables. A statistical evaluation of the data confirmed the apparent lack of differences, indicating that the groups participating in the three States generally perceived comfort level, and thus bicycle compatibility, in the same way across the six-point rating scale.