
Modeling Driver Vision 219
windshield angle and with a decrease in the sun angle, which in turn reduced the visibility distance.
Thus, the worst visibility distance was obtained when the windshield rake angle was at 70 degrees
and the sun angle was at 10 degrees.
Effect of Vehicle Design Variables: The design and appearance of the vehicle can be directly
affected by the windshield angle, the instrument panel angle, and the material on the top of the
instrument panel. Therefore, a sensitivity analysis on visibility distance was conducted by using
the above three variables. The results of the analysis are presented in Figure 12.10. The dashed and ...