The problem of urban traffic is increasing serious and traffic jam has propagated
in the large ,especialy in the urban center.Although government make great efforts to
solve the problem and make enormous progress.Meanwhile,in terms of the situation of our country,due to the lack of new conception,some efforts make no result ,the more effective and economical way should be make with a long-term sight.
The paper regards the model of roundabout as the research object,investigates its
traffic volume of rush hour , basing on Wardrop formula that is a calculation method of the interweave traffic capacity.Its guidance idea is that the bottleneck interweave
capacity determine capacity of the whole roundabout.It puts forward restrained inter-
weave section volume method of calculating traffic capacity of the whole roundabout
.By investigating traffic volume of the Nanmenkou Plaza in Ganzhou and calculate its
traffic capacity. To be calculated by the central bank of the intersection with the survey in the capacity by the peak-hour traffic in comparison to the proposed southern
entrance of Ganzhou City,central bank of traffic intersections organizations optimize the programme.