In depth study of the use of the road system

so as to carry out an empirical test by using the current situation of traffic operation on the road design specifications and related indicators. Evaluating the urban road network by using the massive objective spatiotemporal data will help to summarize the rationality of the existing transportation planning concept

the related technical basis and the design specifications. Using the floating car data of Shenzhen city

the distribution of urban traffic flow

its affecting factor as well as the relationship with road construction are analyzed from three aspects

including the road network

different levels of roads

and roads intersection. The results show that: ① Factors affecting the spatio-temporal distribution of traffic flow include the time

road itself attributes

location factors

the speed of higher level road connected directly. ② By analyzing the speed of different types of road length ratio

we find that actual operating speed of sub-distributors is low which indicates there is some irrationality in Road Design Standard. ③ The intersections of urban roads usually affect the near traffic flow within 100 meters

and the average queue length of intersections is about 35~40 m.