Transportation Statistics and Microsimulation

312    ◾    Transportation Statistics and Microsimulation

N Number of vehicles being simulated

A Number of links in network

e Enter

X Exit

e average travel time for link a for a given period, p, is shown in

Equation 15.8. Note that in order to utilize Equation 15.9, the time period

has to be dened. It is important to note that for nonlinear aggregate rela-

tionships, such as aggregate-based air pollution estimate techniques, the

selection of the time period can aect the results, all else being equal. For

example, if the travel time is input to a nonlinear model, then the results

will be a function of the time period chosen. Assume t ...