Abstract: In this paper, a residential land (3.26 km² approx) in Wuhan is taken as the planning area. Combined with on-site-collected resident trip volume and the matrix of traffic capability with the assistance of traffic simulation software Trans CAD, the equilibrium between traffic generation and attraction is predicted and analyzed, also the matrix of trip volume of the objective year (2020) is built and the traffic assigning parameter is acquired. The development intensity and concentration of units in communities and other factors are also included to conduct visual assessment. Results show that, first, the time spent in open communities is less and the waiting line is shorter than that in gated communities, so the cost will be reduced; and second, there is connection between the planning area and spatial units in communities. Adjacent units are positive correlated that communities near the junction in the southeast are highly aggregated and the resident trip volume is larger, while communities near the junction in the northwest are loosely gathered and resident trip volume is smaller. This means choosing roads in the northwest during peak time in the morning and evening is a feasible way to avoid traffic congestion. Aggregation of communities in the middle area is not obvious.

Key words: municipal engineering, open community, traffic congestion, Moran?s I, simulation technique, Wuhan city