Abstract: To support the construction of high-quality riding space on urban roads under the background of green travel, an elaborate bicycle lane width design method was proposed under electric bicycle mixed condition. First, typical bicycle lane sections in Shanghai were observed, electric and traditional bicycle running data were collected, respectively, fitting analysis was used to explore volume, per bike occupation space (BOS) and speed relationship characters, and characters' differences were compared under different lane widths and electric bicycle rates. Second, based on BOS, A to F totally six levels of service were provided under three electric bicycle rate conditions (<0.5, 0.5-<0.7, and ≥0.7), levels of service of B, C and D were design goals, hence maximum, suggested and minimum design width were given. Results show that maximum width increases obviously when electric bicycle rate is above 0.5, suggested width differs by 0.5 m in same volume for three electric bicycle rates, and minimum width increases obviously when the electric bicycle rate is above 0.7. Compared with present standards, elaborate width design under different electric bicycle rates can fit large flow demands of above 2 000 bikes each hour, and adapt various road space resource situations (abundant, moderate, and scarce). Finally, measured data example and VISSIM simulation experiment were used to validate, further proving that the elaborate bicycle lane width design results considering electric bicycles are feasible.