Most of previous studies about accessibility focused on single traffic mode. This paper takes the weighted average travel time as an indicator to analyze the accessibility differences by using ArcGIS for three different traffic modes. Different transportation networks

including metro

highways

normal roads and combined networks

show a similar pattern. The area with highest accessibility is in the central urban area with a developed traffic condition. The better accessibility areas extend from center to the north

east and south. Since the distribution and running speed are different in networks

the percentages of area with an accessibility coefficient less than 1 in metro

highways

roads and common integrated transport network are 87.59%

58.18%

77.50% and 85.17% respectively. We also found that the difference of the average travel time is very large in the same district

e.g.

the difference between the maximum and minimum average travel time is 79.85 min in Zengcheng and Conghua.