The purpose of this study is to evaluate the contribution of the road traffic vibrations to the noise annoyance by using the surveyed data in Sapporo. Path analysis was used to estimate the direct and indirect effects of sixteen independent variables on noise annoyance. The principal findings are as follows : 1) The strong direct effects are for disturbance of falling asleep, bother-someness of vibration, noise level presented by L_<eq(24)> and awakening. 2) Vibration level presented by VL_<10> have the strong indirect effect on noise annoyance. 3) The effect of 10dB of VL_<10> on the noise annoyance is equal to that of about 3.5 dBA of L_<eq(24)>.
