Application of Gravity model of double limit in traffic distrbution prediction of XingTai traffic planing

Traffic distribution is an important part of four phases method. Many ways are applied in the work. Among these ways, growth ratio way and Gravity model way are often adopted. Through introduction the Gravity model and analysis on characters, the emphasis is on Gravity model by double limit. By means of analysis on choosing and branding model, it concludes that it is feasible in traffic distribution prediction which the planing area has great changes during the planing phase.