linear utility function, non-linear utility junction, and randomly distributed parameter utility function were all specified to find the effect of utility function specification on the updating of model 效用函數(shù)指定除一般常用的線性模式外,另建立旅行服務(wù)水準(zhǔn)變數(shù)為非線性與旅行時間變數(shù)之參數(shù)為常態(tài)分配之效用函數(shù),來探討效用函數(shù)指定對模式更新之影響。