Although linear regression has been a

popular method for estimating trip generation models, there is a problem in

that the estimated linear regression models can produce fractions of trips for

a given time period.

Because fractions of trips are not realistic,

a modeling approach that gives the probability of making a nonnegative-integer

number of trips (0, 1, 2, 3, . . .) may be more appropriate

One such model is the………………….