In order to provide reference for urban road planning and design

a traffic survey was conducted under the interruption of roadside bicycles. The influences of the number of roadside bicycles on average travel speed and cars' saturated headway of adjacent lane were analyzed

and the models between them were established respectively by regression method. Based on established models

suggested adjustment factors were given to calculate possible capacity of urban arterial road segment

and case study was conducted. Thresholds of the number of roadside bicycles were presented to evaluate LOS (level of service) and set separate facilities on urban arterial road segment. Results show that average travel speed decrease and cars' saturated headway increases with the increasing of the number of roadside bicycles

and the quadratic function relations between them is observed. The greater the number of roadside bicycle

the higher road design speed

the smaller the adjustment factor

indicating that the influence of roadside bicycle on road capacity is greater. The higher the design speed

and the lower the threshold of the number of roadside bicycles when LOS is the same

showing that the effects of roadside bicycle on traffic operation is greater for urban road segment with higher design speed.