Abstract: Pedestrians and cyclists are the most vulnerable road users in traffic crash in China, so the related research is of
important significance. Vehicles were classified into three types, Sedan, SUV, the Onebox, according to IHRA (International
Harmonized Research Activities). A vehicle-pedestrian collision model and a vehicle-cyclist collision model were built using the
MADYMO program to simulate and analyze the relate factors influencing the head and lower leg injury parameters and kinematic
parameters, such as the horizontal distance, the wrap around distance (WAD), and the motion state of pedestrians and cyclists.
Relative curves of injury parameters and velocities were obtained based on the simulated parameters with the logistic regression
model. The results show that vehicle impact velocities, vehicle geometries, pedestrian and cyclist figures, initial impact locations,
and initial impact angles are major influential factors, with different injury risks and kinematics for pedestrians and cyclists.

Key words: pedestrian and cyclist, injury parameters;, influence factors, wrap around distance (WAD)