Transportation Statistics and Microsimulation

Microsimulation    ◾    307

addition, the modeler must be able to identify the accuracy of the estimate,

as was discussed earlier in this chapter.

However, if the goal of the model is to identify the best design alter-

native, then the absolute accuracy of the model is less of an issue pro-

vided that the performance measures generated from the model correctly

reect the dierences between the designs. is is illustrated in Figure 15.8

for designs 1 and 2 where the lower the value of the performance measure

(e.g., delay) the better the design. For both designs, the model overesti-

mates the measure of performance, but it does correctly reect the ...