Projecting Fatalities in Crashes Involving Older Drivers, 2000-2025

or decline, with the second option always representing the level ORNL chose. The variables
can also be changed at a “Custom Growth” rate chosen by the user. In addition, the nature
of some variables allows for them to be changed at the regional and gender levels, meaning
the user can select different levels of growth for each gender or region. Income and health
status can have different levels for region and/or gender, while “other driver” and employment
status can only differ by gender, with urban status only allowed to differ by region. These
patterns follow the data used by ORNL for our projections. The following screens show how
one can modify the various levels of the independent variables. The first screen shows what
the user first sees in step 3. Clicking on the check boxes that say “Same growth for all
regions” and “Same growth for both genders” will give the user the second screen below
(Step 3a), which lets one change income at different levels for region and gender. Selecting
the option “Custom Growth” from one of the drop-down lists will give the user the third
screen (Step 3b), and clicking on the up or down arrows increases or decreases the value of
the growth rate while the text below the box illustrates the effects of such a change.
Step 3: Modifying Income levels
GM Project G.6 9 - 21
October 2000