Abstract: Protection of pedestrians and cyclists are especially crucial in China where mixture of vulnerable
road users and vehicles is common on urban roads. Two sets of models were built, i.e. the cyclist-bicycle-vehicle
model and the pedestrian-vehicle model by using MADYMO software. Cyclist-vehicle collision and pedestrianvehicle
collision were simulated to analyze the kinematic processes of the cyclist and the pedestrian before the
head-vehicle contact by comparison the movement locus, the speed, and the impact time between the cyclist
and the pedestrian. The results show that the head movement relative to cyclist pelvis is close to that to the
pedestrian, and at the moment of head impact; the cyclist head speed is lower than that of the pedestrian; and
for a given stature, the correlation between the head impact time and the ratio of stature to vehicle velocity is of
good linearity, and the slope is independent on the stature.

Key words: vehicle engineering, passive protection, cyclists, pedestrians, head impact, kinematics