基于现场调研，分析了化工园区卡口位置、道路条件及交通组成等影响因素；根据交通需求，对化工园区卡口功能进行分类，明确卡口布局的思路和原则。以南京江北新材料科技园为例，分析当前卡口设置限制和拥堵成因，提出优化改善措施，为化工园区封闭化管理后的卡口布局提供理论依据。

Based on field investigation, this paper analyzes the location of bayonets, road conditions and traffic composition and other influencing factors, classifies the function of each bayonet in a chemical industrial park according to traffic demand, and clarifies the ideas and principles of bayonet layout.Taking Nanjing Jiangbei New Material Technology Park as an example, this paper analyzes current situation of bayonet setting restrictions and congestion causes, and puts forward optimization measures to provide a theoretical basis for the layout of bayonet after the closed management of chemical industrial park.