While many states and municipalities have converted to the metric system of measurement, other localities still employ the English system or the geometric and operational information contained in the data bases is in English units. For these reasons, an English units version of the bicycle compatibility index (BCI) model is provided in table 7.

Table 7 English units version of the Bicycle Compatibility index (BCI) Model

An English units version of the Microsoft Excel workbook is also included on the enclosed diskette and is named BCIENG.xls. The primary changes within the workbook reflect the need to enter data in English units. Within the Data Entry worksheet (see figure 6), the posted speed limits and the 85th percentile speeds are to be entered in units of mi/h, while curb lane and bicycle lane (paved shoulder) widths are to be entered in ft. There are no changes in the Intermediate Calculations (see figure 7) worksheet as a result of the change in units. Finally, within the BCI and LOS Calculations worksheet (see figure 8), the BCI equation has been changed to reflect the English units version shown in table 7. The compuation of the 85th percentile speed for the SPD variable now adds 9 mi/h to the posted speed limit.