【摘要】 道路是城市交通系统的核心要素，是连接各区域、承载交通流量的基础设施。立交桥作为城市道路网络的枢纽结构，是交通分流的核心工具，因此，立交桥结构的模型构建对于城市交通仿真、导航定位等领域具有重要作用。然而，传统立交桥建模方法存在语义几何关联较弱与三维拓扑表达不足的问题。为此，本文通过对立交桥结构的分析，提出了一种普适的分段分层立交桥模型构建方法，实现了高程数据受限的低数据成本下的城市复杂交通场景的三维立体构建。此方法能够对具有复杂结构的不同类型的立交桥进行建模，提升了立交桥建模效率，精准刻画了立交桥的空间层次关系，可有效支撑道路导航、自动驾驶、城市虚拟场景模拟等仿真应用。更多还原

【Abstract】 The road is the core element of the urban traffic system, serving as the fundamental infrastructure that connects various regions and carries traffic flow.Overpasses, serving as key structural components within urban road networks, are essential tools for traffic diversion.Therefore, the construction of models for overpass structures is critically important in domains such as urban traffic simulation and navigation positioning.However, traditional overpass modeling methods have issues with weak semantic geometric correlation and insufficient 3D topological representation.To address these issues, this paper proposes a universal segmented and layered overpass modeling method through a deconstruction analysis of overpass structures.This method achieves 3D modeling of complex urban traffic scenes with limited height data and low data costs.The proposed method is capable of modeling overpasses with diverse and complex structures, enhancing the efficiency of overpass modeling and precisely depicting the spatial hierarchy of overpasses.It effectively supports simulation applications such as road navigation and automatic driving, offering inspirational implications for the construction of urban 3D traffic network systems and the simulation of urban virtual environments.更多还原